Are we going to block Meta’s Threads.net? I get it if people want to keep things open. However, Meta is a proven bad actor. They claim they didn’t put in ActivityPub because it was too complicated to get it done at launch, and they can’t get EU approval of their service because of the rampant and invasive data they gather. IMHO, they are going to attempt to muscle the fediverse out of the equation.
This is a good point. They would be able to manipulate the feeds of users on their servers. And if the algorithmically inspire bad content above some threshold, that would be a concrete reason for instances to defederate. But I still wouldn’t defederate preemptively.