Interoperability would go a long way, but if they're still expected to hold moderation privileges on their platform, they could just as easily block communicati

Interoperability would go a long way, but if they're still expected to hold moderation privileges on their platform, they could just as easily block communications from a user who is using a non-Facebook federated system. If Facebook became decentralized, it's inevitable that there would be more spam and automated bots to deal with, so moderation would be key. This could possibly be mitigated by giving group moderators higher privileges than Facebook moderators. So Facebook could submit a ban request, but the group admins would have to approve it. Facebook could block a public feed but not full functionality. And how forced interoperability would work would differ in each country, but at least in the US, this could be accomplished imply by tying Title 42 privileges to federated interoperability standards.