What's the point of a perma ban if toxicity still goes on?

people who might flame maybe wont even get reported or banned and still flame. a banned guy will say "i've got 4 permas" as a badge and maybe get worse with each perma. why is riot keeping up with it? why they don't find another way to get the flame off? I really need a rioter to explain to me how permabans are working while we get nothing but flamers on every game, because as it seems to me, it's all about the money, not about the community. permaban sounds more of a revenge from a player to a player. toxicity havent stopped and wont stop that way im tired of playing with flamers every game.
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