... but in the presence of persistent harassment that will not cease online, tying the behavior to the person behind the behavior and bringing proper consequences to bear is the only regulatory system that actually works. There's a reason that you can be fined or imprisoned for trying to pull crap like that IRL.

But I am sorry that you were falsely accused. That is a possibility (both in doxxing attempts and in more "traditional" harassment).

False accusation is entirely possible, but it doesn't imply we just let harassers get on unchecked.

Here's the thing: they did do that. But the banned person would not move on, and continued to evade the ban and be a pile of misery for everyone involved. "Ban them and move on" is the sort of advice that works great until it doesn't.