I get why World and many others defederated from Burggit. Obviously it has questionable content which is not great to have stored on big servers for legal reasons.
But look at Threads, owned by a company which steals data and causes harm to anyone in any possible way. If you don’t see their actions questionable as well and don’t see how they are parasites trying to leech on the fediverse and suck everything away then there was no point in defederating from any questionable instances.
I don’t think it’s a question yet. I’ve seen several people say today that Threads doesn’t have federation enabled. It’s possible that they’ll want to stay in their own walled-off ecosystem.
But I do think it would be prudent to have a plan of attack ready to go to cut them off immediately if they ever change their minds about that. Every respectable instance in the Fediverse should.