The main concern for me is, what data would Meta be able to get their grubby fingers onto, and I don't know enough about how the innards of ActivityPub and fedi work to know to what extent that would be an issue.

If they can grab loads of data just by being there then yeah, block the crap out of them!

If they don't stand much of a threat that way, then I'm in favor of letting them be, since P92 will definitely bring loads of people to the fediverse, a good thing.

Knowing what I know at the moment (which isn't much) my vote would be to preemptively BLOCK, assess after the thing goes live, then unblock if it's safe. I don't know about going the whole nine and joining a whole pact formally though.

❤️