here's what i don't get. the text verbatim for blocks in the AP spec is:
6.9 Block Activity
The Block activity is used to indicate that the posting actor does not want another actor (defined in the object property) to be able to interact with objects posted by the actor posting the Block activity. The server SHOULD prevent the blocked user from interacting with any object posted by the actor.
Servers SHOULD NOT deliver Block Activities to their object.