Thoughts on federation
@noelle Federation or de-federation, for any reason or no reason at all, is not innately moral IMO. It can be wise or poor judgment, relative to some intended goal, and it may be an immoral violation of trust between an admin and users. But the answer is always local.
Impersonating someone (I.e. "social identity theft") is the thing that comes to mind for me for "damaging, objectively immoral things an admin can pull." The subject cannot simply walk away.