A rather hilarious way to piss off flamers, but be unbannable as a result.
Be a genuinely nice person. Give encouraging advice. If they scream and curse at you or the enemy team, tell them that their actions aren't very nice and they should take other's opinions into consideration before speaking, and they should think about apologizing. I swear to god if you just want to watch some flamer blow a casket just for the hell of it give it a try. And the best part is, nobody can ban you for being a nice person. Works every time. hehehehehehehehe.