Suppose the best solution for this problem- is a better system for handling banned/toxic users...
Would need to be prob a third party script, distributed amongst multiple instances. But- that would also require a certain level of trust between admins too.
If memory serves me- back in my minecraft days- we used mcbans, pretty effectively for this purpose.
For websites / forums, I used cleartalk, which actually worked pretty effectively... but, for spammers.
I'll have to take a look and see the level of effort to integrate that into here.