Eliminating Toxic Players

I am not sure how well this would work or if it is even a feasible idea but hear me out.

What would happen if Riot required phone number authentication to create an account? Anybody can make multiple emails but no one can just go get a new number whenever they feel like it.

I realize that some people don't learn their lesson the first couple of times around. So I was thinking of adding a three strike policy to this. You have a limit of three perm bans before you have all accounts associated with that phone number permanently banned.

Multiple accounts can be made with each registered phone number. After three accounts being perm banned, all accounts associated with that account would be immediately banned indefinitely. The only way to possibly create more accounts is with a new phone number.

This is just an idea I was brain storming with. Give me some feedback on what you think about this and we can try to tweak it as needed.