see linked post. I believe this would count as one of the examples given in the federation policy https://lemm.ee/post/401063 :
An instance which is knowingly spreading CSAM into the federated network
You get to decide. Is this instance not democratic when it comes to federation instance decisions? Hexbear admins give us a vote on a per-instance basis.
Which is why Lemmy is a good system but I think that system is rather fragile because instances like lemmy.world could get the majority of the users, be absolute saints for a while so everyone gets comfortable and then influence the rest of the instances with threats of defederating
I guess considering there’s no monetary gain from having more users that doesn’t really work as well but still