I second the reviews on this page, complaining about the unpredictable and unfair moderation on CD. You can get in trouble if you post anything which challenges the conservative mindset. And there are some very vicious types who do as they please but are never banned; perhaps they're the owners, for all I know.
CD is addictive: you can get useful information, encounter interesting people, and work on ideas anonymously. But don't make the mistake of thinking it's fair or become negatively effected if you get chastised and/or banned. It's still a zoo.