So, I'm a strong yes.
Every ActivityPub post has a `replies` collection that contains all the replies to the post. The definitive version lives on the original poster's server.
The OP should be able to either approve replies before they're added to this collection, or remove them from the collection if they're added automatically.
Federating the _list_ of replies from the poster's instance isn't currently done, is it?
Doing that would address (maybe?) one of the (least toxic) causes of the reply-guy phenomenon — that small instances often don't have a complete cache of all the replies to a post on another instance
Yes, the `replies` property is a standard property.
https://www.w3.org/TR/activitystreams-vocabulary/#dfn-replies
From the horse's mouth!
So, (1) servers respecting `replies` in display, would help with the "I can't see others' replies"?
And (2) an ability to remove entries from the `replies` property, combined with (1), would approach what kissane was suggesting?
Evan Prodromou
Jeremy Kahn