Some compelling data here supporting the idea of kicking out your most difficult users. These kinds of users are thankfully very rare, so the labor of kicking them out is worth it:
https://twitter.com/emollick/status/1490078052239433735
And when moderating content, the importance of leaving signposts about why the bad posts were removed, rather than just making stuff go poof:
https://twitter.com/emollick/status/1490082986322186245
The two papers are “Community Interaction and Conflict on the Web” (pdf link) and “Does Transparency in Moderation Really Matter? User Behavior After Content Removal Explanations on Reddit” (pdf link).