In this game you can intentionally throw a match and not get banned for it.
i ran into a duo who said it was my fault they lost lane because they thought i was coming to gank their lane when i never said nor pinged i was coming.
we got into an argument and they decided to throw the game
well i ended up chat restricted and they ended up walking away unscathed.
guess what? i got them again
guess what? they trolled another game.
too bad riot only cares about chat logs and not in game performances.