Thumbs down for bad players

I know that you can report players but I think that's a bit much. I mean it's not like Riot is going to ban players just for being unsportsmanlike. I like how there's a system for giving people thumbs up for being friendly and using teamwork and such and I feel that it would be beneficial to have a thumbs down for people that are being the opposite. That way people could "earn" badges for being unfriendly, using lack of teamwork, being unhelpful or being a troll.

Because Personally I'd rather wait out the 5 minutes that I have to for leaving a game queue than to spend 20+ minutes in a game with a complete troll that spends the bulk of the game KS'ing me.

I am not going to lie though, if this system was implemented then I'd likely have a lack of teamwork badge by now as I often insist on mowing down my own lane but I still advocate this idea as it would give people a better idea of whom they're about to get into a game with. But ya, just some form of badge system that would let people know that someone is a lone wolf like myself or that someone is likely going to go out of their way to ruin your game.