It may not be written de jure into their instance rules but it is de facto.

You can block an instance but you can’t block all of its users (without hopping to another instance that happens to be defedded from them). I could also do without their users slandering me and mischaracterizing my actions

I wonder if any mods/admins have data for which instances’ users are most prone to violating which instance/community rules. Pretty consistently, it’s predominantly dbzer0 and blahaj that I’ve personally seen posting AI content in places where it is specifically against the rules.

Also, here’s a plug for two alternative communities to discuss mod actions:

!ModlogAbuses@sh.itjust.works

!modlog@lemmy.world