EVE Online's forums.
The community of the game itself is fine, brilliant even, but if you're not constantly hurling abuse at and swearing about CCP on the forums (and god forbid you actually make a logical argument in the developers' favour), 90% of the occupants will get really nasty with you. And let's not get started on the jerks that go into question-topics looking only to make the asker look like an idiot, instead of helping..
I think the sane ones that know CCP are generally doing their level best, and/or want to just chat about the game, have long since sodded off to other fora. While the vast majority of the EVE community are great people spread across goodness knows how many places and readily engaging in the game itself, the official forums are regarded more as a quarantine zone where all the racist, vicious-minded, economically-moronic trolls are kept out of everyone else's hair.