I began a game 0/9/1...
It was a rough one. I was on a winning streak, but it was 1 AM, I was getting tired, I was playing a new champ (Kayle, not that she's especially complex), and I just got BAD. Solo kills, carelessly getting ganked, forgetting to properly ult/use summoners, you name it. I fed HARD. It was possibly the worst I've ever played in my League career
I didn't get flamed.
I mean, there was grumbling. "First time?" "Kayle pay attention pls" "Come on, dude", etc. But I've been called every name in the book for doing half as bad, and this time, it didn't happen. We didn't play the typical League blame-game. We didn't forfeit when we were losing by a lot. We didn't passive-aggressively run off solo and get picked off. We didn't tilt. We regrouped and coordinated.
We WON.
I ended the game 5/13/12. Pretty terrible score, but you'll note that it's 5/4/11 after our turn-around point. With encouragement and not blame from my teammates, I cooled off and farmed up, focusing more on peeling/healing/ulting my carrying teammates than diving in for my own kills. I wound up ending the game with the most CS and very respectable damage/healing done, and by the end of the game, we were playing so dominantly that you almost couldn't tell how poorly I had been doing earlier.
So, a thought for you guys grumbling about being punished for toxicity: Your loss of chat privs/game time/hextech aside, you're simply shooting yourself in the foot by acting that way. Even scrubs like me can turn a bad game around, provided you work with us a bit. This game is infinitely easier to play (not to mention more fun) when everybody stays positive and keeps a level head.
TL;DR: I fed, didn't get flamed, was able to help win. Positivity>Toxicity.