Lilly E.

I find the general community to be a positive and welcoming space, who work to protect and respect all other members on the site. However, there are also uncomfortably large, shady cliques within, who are known for breaking the TOS and attacking other users.

I've heard of many stories of people (including friends) who were the victim of offsite stalking, doxxing, suicide baiting, and extensive witch hunts and bullying by a wider group of users. As extreme as these cases are they are not rare, and they lead victims to leaving the site, and often result in real life emotional and mental health damage.
Many of these incidents happened offsite (tumblr, discord) where penalties were not issued, but sometimes it also happened over private messages and onsite forums.

What's also really disturbing, and possibly unique to the site, is the presence of at least two offsite blogs that are frequently dedicated to targeting and harassing other users. In some respects they resemble the very seedy places of 4chan, to set example. They are visited by a large portion of the community, and work via anonymous submissions so there is no way to trace back to the author and report them.
The staff are even rumored to visit both of these blogs and interact with the moderators, but it never leads to penalties for the people who run them.

Speaking of the staff, they aren't well known for dealing with harassment properly or even attending to a serious situation when it occurs. They have a ticket system, but are /terrible/ about responding to tickets, close significant tickets before they are properly reviewed, and completely ignore cases of cyberbullying offsite no matter how damaging it becomes for a user.
I've personally experienced staff penalizing or closing one harassing account, only to see the same person make a second, illegal account and not have it scrutinized after sending in 3 tickets.

That all said, interact with the community at your own risk when joining FR. Don't ever link social media to any of your pages, offsite blogs, or anything that cannot be reviewed by the staff. Because people will target you if you leave vulnerable information. And if you are harassed onsite for any such thing, be well aware that the staff may not come to your aid.