@rcombs However that's NOT EVEN HOW FEDERATION WORKS. If I post on my instance A in a way that someone on instance B needs a copy, or if someone on instance B explicitly fetches a copy, it does not get further propagated from instance B to instances C, D, E, and F!
Other instances might come to know of the existence of the post via instance B (reply chains, etc. involving one of their users and someone on instance B), but the actual content is fetched directly from instance A.
The only way other parties acquire permanent copies of my post via instance B is if they are *intentionally and maliciously scraping the public web interface*. Not via following the AP protocol.
B does not need any permission to do anything with my posts beyond "ephemeral display to folks with permission to view my posts [which may be public, depending on post]". It does NOT need "permission to relay".