> The behavior of Offer activity is not described in ActivityPub
You can still take the document and place in the target inboxes, leaving to the *client* to figure out what to do with it.
You don't need to describe the specific case if the general case (activities must be placed in the target inbox) is enough.
Is this your objection when you are talking about "Generic Servers"? Because if that is the case then I can definitely argue that my server is it.