@Riot, you need to take care of the bots flooding co-op vs ai queue.
I have played ten bot games within the last twelve hours, and there were two or more "bots" on my team in 3 of them. It's getting to be nearly as bad as playing Twisted Treeline.
By bots, I mean players that are obviously using programs to play the game for them. The ones on Summoner's Rift always go to farm in the jungle and don't participate at all, excelling instead at preventing people that are actually playing from taking the buffs.