I recently popped onto a smurf, 5 man queued normals and picked Tryndamere middle. The enemy team killed me once and they started to say 'ez' and all of that, so I decided to start flaming in a joking way along with my friends. We ended up winning and I got off the game. Like an hour later when my friends wanted to play again, so I popped back onto my smurf, and boom. 14 day ban.
I'm not complaining or anything, just suprised. Good job Riot.