jaywinkwell, even this leaves implementation details. also, forwarding private messages IS possible, if the audience is known in the object. which I guess in mastodon it isn't :P
jaywinkwhich unfortunately means mastodon wont benefit that much from AP - I mean the fact that Ostatus doesn't allow proper delivery to all conversation participants wont be fixed
jaywink(it's the reason I personally don't use mastodon - broken conversations. but then it's pure microblogging anyway so maybe that fact is less visible than "post" based systems)
cwebber2you have to take an extra step to look it up but it should work assuming you have access to it... with some exceptions of forwarding to followers