@alwirtes My view: defederation should be a nuclear weapon saved for virtually unmoderated servers.
X is increasingly in the "we don't moderate anything but illegal speech" camp. Thus unmoderated for vast amounts of things violating my servers TOS.
I'd advocate blocking them within minutes of them joining the Fedi - if they showed up with those policies still in place.
OTOH: Any server that is even TRYING even in an uneven way - to moderate, I'd protect my folks with less "violent" tools.