Needs to be a 3 strike system for people who intentionally feed/lose the game.
Just got done playing with an alistar who would constantly headbutt kennen while he was ulting to our backline (quite intentionally) he would run in and die whenever he saw fit, he would headbutt my camps through the wall to reset them.
Of course you look at their recent games and its a lengthy string of troll nonsense. There is nothing more frustrating than someone on your team simply not wanting you to win.
guess this lacks clarity, in RIOTS opinion if it was intentional, not ours.