Though C-D permits itself to ban members from the site. It does not have a straightforward mechanism which would allow a person to cancel their membership. I can understand that there are a number of reasons they would not want members flitting in and out on a whim, but they do not seem to allow a person to leave on even a now-and-forever basis.
Essentially you have to maneuver to get thrown out it seems.
UPDATE 5/21/21: If you want info on local communities, you can get good input on those sub-forums. However, many of the other sub-forums are pretty weird. Most members identify as Boomers and conservatives, but few are Christian. The Christianity sub-forum has mostly liberal Christians or atheists on there who poke fun at the 2 or 3 conservative Christians who post sometimes there. The Politics section, meanwhile -- which is MUCH larger -- is generally far-right, but curiously almost completely secular. Most are either pro-abortion or pro-sterilization; they don't want liberal children to be born, or at least don't want liberals to be able to produce children. I didn't know such a large number of people existed in the US, but they sure do gravitate toward CityData's politics forum. I've posted on the forum on and off for a few years, but I think I'm done with such a crowd.
Did you ever see the movie Napoleon Dynamite? It's a movie about an awkward teenager who hangs out with a bunch of misfits. Well picture that but with racists, that's City Data Forum. In the movie Napoleon Dynamite, the characters are odd eccentrics but well meaning and likable. The posters and moderators on city data however don't have any of those redeeming qualities. These are the crazy racist neighbors or co-workers that nobody talks too. The members aren't just your run of the mill racists like your uncle, no, these are the basement dwelling ones that consider Fox news too mainstream or the NRA too soft. Just thinking about these band of miscreants makes me sick. I left the forum recently and never intend to look back. I hope I can save you the time and energy from posting on that time waster.
So this site is pretty odd to me. It is supposed to be a discussion site on cities/data/urbanism with fair game to have discussion. It is heavily moderated to even the slightest disagreement like we are children in elementary school and cannot have a fair discussion. A lot of bias. And overall it is complete $#*!.
Suspicious activity, abuse of power, unfair. Seems to be teeming with paid shills, mass media, government and military trolls, hasbara agents, people's opinion guidance operatives that want to control what you say and when you say it.
Some of the mods seem to over react to the most trivial of reasons, be careful which sections you frequent or you may be banned for life. Steer clear of the "Ask the Forum" section and the" politics and other controversies" section The rest of the forum can be a source of much information.
As an ex-New Yorker, living in Virginia for 32 years and now looking to move to another state I have found City Data to be extremely helpful in weeding out places I would not want to live. The forums are very helpful because they put you in touch with people who actually live in those places and the pages on City Data are overwhelmingly helpful when it comes to things like population and crime statistics. Real estate agents are by law not allowed to discuss things I feel I have a right to know before I move someplace. I check City Data for every city I consider. There are other sites I check also, and the truth is when I do actually visit those cities, while house hunting, I find that the majority of what is written, whether it is good or bad turns out to be true. City Data isn't just helpful, it's a necessity.
Whenever I take a conservative stance on a position the liberals go crazy then bring in a liberal moderator and my posts are deleted and the thread is shut down.
The moderator yellow belle is an especially liberal moderator who seems to relish deleting my conservative posts.
This City-Data website is literally a cult! I was giving advice on how to improve people's profiles on Tinder using Photofeeler, and my account got permanently banned for "spam". Most of my threads got deleted, even the one asking to rate my dating app biography. This is a dictatorship. Westboro 2.0
Yes, that's right. The poster ended his post with "88", which is code for the 8th letter of the alphabet, which is "H". I reported the post and was given a lifetime ban. That should tell you all you need to know.
Overzealous moderation, unless you live in southern Oregon, where the California transplant moderator lives.
The moderator has "moderated" this forum into the ground.
It is now useless.
Most of the regular Oregon posters don't even live in Oregon., and they all seem like older preppers or redneck survivalists.
Maybe TWO of the Six Portland posters do live in Portland, but they are geriatrics with a very limited knowledge of modern Portland.
Don't wast your time here.
Useless and outdated information.
Chock full of hillbillies who consider every big city a cesspool. They constantly post threads about how horrible cities and everything they hate about cities (traffic, liberal policies, too many minorities, noise, taxes, etc.) Someone needs to tell these country bumpkins that it's called city data not country data. Nothing wrong with the country, but if you hate cities why go on a site called city data. Ironically many of the people posting are yokels who despise cities and everything about them.
Everyone. Do not post anything on C. D. web site, forum or purchase anything on their site. Your personal data is not safe. They do not have a certificate. At the very least, they are not allowed to accept credit cards without, at least, a 126 bit SSL certificate. Without a cert. You run the risk of hackers accessing your personal data.
I wrote a good response, full of information that most people are not aware of, and immediately got banned. OK, so my company provides the service that I mentioned, but the post was written about the services in general and not specifically about my company. That is not "advertising or spamming". That's just childish stupidity on the part of the moderator.
I called out a couple of people who were being insulting and nasty to others. I wasn't insulting or rude in return and I am the one who gets banned. They have a right wing agenda and if you don't the will look to censor you. It's ok to call other people names, be insulting, post racist, misogynist posts but you can't stick up for those people. Marka is a HORRIBLE human being who really needs to be investigated which I have started the process of doing.
The forums are useless and the "general" forums are filled with hate speech and promotion of racist agendas. In the city forums, most people are there with an agenda or some type of chip on their shoulder. Don't be associated with the site, it could reflect negatively on you
The site isn't actually that bad for things that are not related to politics. However, the mods (especially Igibinne) might as well be mouthpieces for Trump or DeSantis. They've gone as far as deleting threads that go hard against far right Republicans. I had a thread that pointed out something pro Biden and got typical blow back from most of their users which at least in the Politics Forum are Right Wing Nut Jobs. However when my thread was locked they deleted my posts in the thread and said it was because of "trolling" but left one in the thread where the poster used terms like "race pimps".
I just got a zero point warning on there for supposedly being rude to a moderator. However, said moderator was rude to me first in her reply to my thread. It's okay if she disagrees with me, but it wasn't okay in how she worded it. I guess being a moderator, a.ka. God, lets her get away with attacking posters, but the same can't be said in reverse.
The cesspool of the internet. This is where logic comes to die. Bunch of ignorant slackjawed racist rednecks. I feel dumber everytime I go on there and read a post. Utter waste of time. Don't bother. Zero useful information. I'll sum it up for you. Cities bad, liberals bad, immigrants bad, non whites bad, christians good, white good, conservatives good. That's every conversation.
I live in the state which protect my rights and they are breaking my rights because they are publishing information about me which is not allowed by the laws in my state. Furthermore, the information on their site is false and misleading and should be removed before litigation is filed.
Answer: Ibginnie is by far the worst moderator. Anyone here stating that she is a right-winger is full of it. She meads out her personal justice on a whim. If she doesn't like your post/thread she will make up a reason to can it.
Answer: There is nothing Liberal about City Data don't believe that lie above. That is a right wing white nationalist run site. LOL@ Liberal.
Answer: 
Answer: I'll give CD this much - you can find reasonably good information there concerning states and (as the name implies) major US cities. Unfortunately, many CD forums are run by mods who want to be kings or queens of their own little kingdoms to the point that they turn into the very bullies and trolls that they are supposed to be moderating their forums against. There are a few forums there that are actually not bad - the retirement forum, the automobile forum, and a couple of the state forums like the Colorado forum (stay away from the New Mexico forum!). The POC forum drags the entire place down thanks to Ibginnie's erratic and heavily partisan moderation style. I have had my posts deleted because I used ONE foreign word in my post (TOS say you must use English only), or because I used the word "troll" just in passing. Ibginnie couldn't care less if alt-right posters call people libertards or baby killers or commies, etc., etc. Recently, she allowed a thread about Hunter Biden supposedly being a porn addict who preyed on his own cousins, and the thread went downhill from there. And of course, QAnon conspiracy theories have the run of the board. One of the other mods who I am friendly with told me that he hates the way Ibginnie operates and he can't understand why she is allowed to remain. I am seriously thinking of sending a link to sitejabber to the owner of the board, so that he can see for himself how destructive certain mods are to City Data's reputation (such as it is). So, yeah. There's some wheat with the chaff, but the chaff can be overwhelming. Caveat emptor!
Answer: Ugh. City-Data used to be great, but I think those Mods you mentioned have run off everyone else. There used to be a lot more mods, but I have noticed that it's the same awful mods moderating more and more of the site. Poncho is modding my city's forum, for example, which is for an Ohio city. What does a guy in NM know about Ohio?
Answer: It's not an assumption. It's the stark reality of the POC forum at that site.
Answer: They've been around for a long time, perhaps at some point it was a reputable site. That is no longer the case. I suspect traffic to the site is dwindling.
City-Data.com has a rating of 1.2 stars from 285 reviews, indicating that most customers are generally dissatisfied with their purchases. Reviewers dissatisfied with City-Data.com most frequently mention right wing, politics forum and conspiracy theories. City-Data.com ranks 1204th among Real Estate sites.