YOU ADD A TROLL TO YOUR BLOCK LIST... then Riot, places the troll on your team and unmutes them.

No visual indication is given that this summoner was previously on your bock list.

At the very least, there should be some icon or visual indicator which shows you that you previously placed them on your personal private, LoL client block list.

How does this serve players who don't cheat or throw matches and simply want to be left alone and/or have a choice, with regards to ever being matched ON THE SAME TEAM with an intentional troll which RIOT WON'T PUNISH.

So fine, don't punish them, go ahead and keep thinking that having these people destroy ranked is healthy in the long term (you'll see, every other game in history has done the exact same thing, and ended the exact same way)

BUT AT LEAST allow players with integrity to decide for themselves whether they want to take a risk and play with this person again. This basically spits in the face of the player and puts power into hands of these trolls, who can continue to feed and troll, eventually encountering the same people over and over.