洪 民憙 (Hong Minhee) 
Most #ActivityPub implementations include Mention objects in the tag attribute when someone mentions another actor within the content of a Note or Article. Should actor objects like Person or Group also include Mention objects in their tag attribute when mentioning other actors within their bio (summary)? Are there any implementations that already work this way? (I've checked Mastodon and it seems they don't include these mentions.) What are your thoughts on this?
marius@hongminhee yes. I can't think of a reason to have different behaviour for certain properties (like tag) based on the type of ActivityPub object.
@hongminhee in #FedBOX and #GoActivityPub there's a cascading of behaviour for each ActivityPub object type, so you can call code on a Person/Group/etc, making the assumption that it has the more limited shape of a regular Object.
Since Go doesn't have more fancy types of polymorphism, I had to use some very ugly work arounds to be able to make this work. :( Sometimes I wish I was still working on a more powerful typed language, or a dynamic typed one.