ActivityPub left giant holes in the spec around two things which sound the same but which are not the same: Authentication and Authorization
Trying to mix these two, you accidentally get ACLs, and then you get confused deputies and ambient authority, plagues of the security world
Anyway, if you know *anything* about me, you know I am a big fan of capability security (ocaps) and that's the foundation of our work over at @spritely
But we will come back to ocaps in a second because it turns out OCapPub is not the only time I proposed AP + ocaps!