My account (this one) is currently in a 14 day ban for flame. However I've been playing on my other account levelling it up and such, and making a real effort not to flame or be toxic.
Doing such I've seen a real positive outcome in my game play, win rate and honour level (of course). I can say that not being toxic and flaming does actually benefit your play and isn't just bull*** which i previously thought.
For all you that don't believe it, i previously flamed disgustingly hard, and trust me. Its not worth it.
(unless you have a yi jgl)...jkjk