Riot should really look into some psychology courses. (Not trying to be rude).
First of all, many many people have smurfs... Multiple smurfs... While so many people in League are toxic, punishing them via banning is only going to actually make it worse. I personally know my main, has all my skins and champs and runes. So I try hard and actually play on my main. But when my main is banned (I'm being punished), it actually creates a sense of not caring. If I cannot play on my main, why not troll and not even try? When animals misbehave, you cannot punish them or they will psychologically change and overtime become aggressive / or other things that are negative.
Discipline, is used to teach and guide people in the right way of what is expectorated to be right. Punishment is using force to try to manipulate/ control someone into becoming what you want of them. Chat bans are cool. Afk Timers are cool. Banning peoples accounts will just make them feed/ be more toxic.
Riot Games, I advise you to please go look online at some Punishment Vs Discipline research / articles and educate yourselves. You guys are actually creating a more toxic / negative environment for league. Not the players.