The #ActivityPub spec says "sharedInbox endpoints SHOULD also be publicly readable OrderedCollection objects containing objects addressed to the Public special collection". Has anybody seen any implementations of this? The spec doesn't specify if the public objects are local to the instance being queried or should only include federated objects (or activities?). Given it's an "inbox" endpoint, I'd guess it's a collection of federated activities (since that's what's posted to the sharedInbox). π€·