Does Riot care at all about Trolls? I'm getting so many games where people just fuck around

They'll outright say in draft pick that they're stealing a lane, or they'll sick in the jungle afk by monsters, and yet they'll still be playing hours after these incidents. WTF is Riot doing about this? They seem happy enough punishing people venting their frustrations about this kind of shit, but they won't do anything to the actual source? Again, is this game supposed to be fun or is it just meant to be a time-sink to dump an hour on, hoping the matchmaking slots are in your favor, when you have nothing else happening?
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