Question on what YOU would do in this situation...
Had a game, my recent one as ashe, where 2 of my teammates trolled alongside the whole other team. My mid WARNED their mid of my jungler ganking... just to have a 1v1 farm game. Then later on, he refused to kill anyone but bot lane, just cause trolling. Top lane basically did the same thing where he wouldn't kill kayle for the most part. The best part: because the game requires 4/5 players to say yes to surrendering, we got stuck playing a game with 2 trolls. On top of this, you can't leave game or they'd report you, (yanno, to play an ACTUAL game). So what would you do? Besides the obvious report them after the game.