This is a tough question, I would probably say that all gaming communities are as bad as each other. I believe I answered this same question ages ago, but I can't remeber which community I chose (I think it was the Left 4 Dead community), but honestly, you can't go anywhere in the world of gaming without encountering complete idiots.
EDIT: I'm thinking the Fifa 11 community, very occasionally people are dicks in online games, but mostly people are silent, but then at the end of the game, win or lose, I will receive a "good game" message.
EDIT: I'm thinking the Fifa 11 community, very occasionally people are dicks in online games, but mostly people are silent, but then at the end of the game, win or lose, I will receive a "good game" message.