Gregory's Server
@androcat @_elena It is definitely not the case that you can query openly *anyone* who is blocking *anyone* in AP. It's true that Mastodon does deliver the Block activity (even though it's not compliant with the "SHOULD NOT" in AP's language about it) but even then, you can't query who's blocking who in the network as an open database
@cwebber @_elena
Iirc, Mastodon is compliant with "should not", it's Pleroma that was developed specifically to skirt the block as a toggle.
But a server has to communicate which blocks to apply when federating, so something posing as an instance would probably enable something like this for AP in general.
However, it'd be a somewhat manual process, because Mastodon is not centralized.