i've got one guy on my friends list, he complains about EVERYTHING. Every time, no joke, every time he dies, he calls the weapon that killed him OP. The thing is though, i can't remember the last time i played with him and he didn't get VSAT/DOGS/SWARM...so yeah...people like to complain (guilty) and it doesn't matter whats going on there is always an excuse to find.
But yeah, the worst community is either League of Legends or some other free-to-play game. F2P games usually attract the absolute worst people because it's easy to get in and troll, and if you get banned, just make another account.
PSN: xMrPolyx, XBL: Mister Poly League of Legends: MrPoly