Add people to private teams by mentioning them (with confirmation prompt)

How about a general feature where, if you @ mention someone that is not in the current private team, Ryver will prompt you, saying that the person is not in your private group and offering to add that person?

So, instead of the @mention bringing up only people that are in your current private team and "No users found" for anything else, have it come up with a balloon notification over the user, saying they are not in the group and with a button that would let you add them.