"sharedInbox endpoints SHOULD also be publicly readable OrderedCollection objects containing objects addressed to the Public special collection

"sharedInbox endpoints SHOULD also be publicly readable OrderedCollection objects containing objects addressed to the Public special collection..."
w3.org/TR/activitypub/#sharedI

I disagree with this SHOULD, would downgrade to a MAY.

Minor, mainly because consider a small instance, whose users do not show their Following collections, this could basically leak who the follows are.

That said, I haven't found any Software that does have a publicly readable sharedInbox!

#ActivityPub