Don't insult anyone as idiot, asshole, fag or other such descriptions, don't snipe, don't troll, don't flame... then you won't get a warning. It could be so easy, but people must start their insulting internet warfare and then they wonder about getting warned and banned. I personally lost all my tolerance for any of that and as soon as I personally see someone writing like a douchebag, he gets a warning. If the person doesn't stop, I will just give out another warning. It's as simple as that, really. Behave like a grown up and all is fine, at least from my side.