Blocking players

So after playing a few games in ranked where trolls basically fed the whole game and refused to take the teams advice, I got pretty frustrated and wanted to just block that person so I would never play with them again. Come to find out that blocking only prevents them from ever messaging you or adding you as a friend. So why hasn't riot implemented a process where you could block players? I would much rather wait longer in queue as the game tries to find players who actually play the game, if it means I can prevent myself from playing games where a player is known for simply trolling. Instead I am held hostage and forced to play a game where its no fun for anyone but the troll and the apposing team. I know other games have implemented this before so it can be done. So RIOT, please! please! please! consider this. We are fed up with the trolls.