The only reason they're complaining now is because they're not winning. I haven't seen any thread I've come across flaming any other team or anything like that. Besides in competitions there has to be a little trash talking, shake people up, get inside people's heads and whatnot.
There's bad winners and bad losers and only losers cry about the winners being poor sports espcially when no one I've seen has been doing it. So just settle down. Just play the games, keep the "we hate such and such team" to a minimum and remember We are Barta and we're doing it for the fish!