where one toxic user can run a topic/sub name for everyone else for forever, since now the sub is banned.

That's a fair point. And were it a more established sub with a wider variety of users, like CringeAnarchy, then you're absolutely 100% right. But given this particular user, the fact he created the zoophile sub and posted about "loving horse cum" or some nasty shit today, and then immediately created this pedophile sub, with an openly pro-pedo first post in it... the guy is clearly trying to fuck with saidit, and this sub is an extension of that. That's how I see this situation.