I have no idea, I've left a few games (not often but it happens, sometimes due to something I can't control sometimes by something I can), I've raged and flamed over chat (not often but sometimes unless you just mute everyone at the begining of the match it's hard not to be dragged in by a troll) and I've intentionally trolled a team of shitty people before. None of these are habits. I think ive only trolled/left intentionally a hand full of times since the original release of LoL but I've never been banned, not for a day. So it confuses me when folks say they've only ever left once or flamed once and now they are permabanned. In fact I find that incredibly hard to believe.