AFK Players.
I think we should have a draw in a game after a player has been AFK for more than 15 minutes. With neither team winning or losing. Teams that have an AFK and lose, do not deserve to lose. It gives an unfair advantage to the opposing team and reporting the player doesn't save a loss. I think this would be highly more effective in stopping AFKs and save losses for players who keep fighting an extremely unfair fight.