If a moderator needs to contact a user (and it's not severe enough to warrant a moderator message), it's common to make a private room and ping them. The procedure is:
- Create a new chatroom (named "Room for UserA and UserB")
- Superping the user with some stub message so a chat account is created for them
- Find the user's chat account through the 'control access' menu of the chat room.
- Add them to the room's write ACL
- Make the room private
- Post the actual message
This takes more time than it looks like. Is it possible to add something to the chat room creation page that takes a chat ID or site+UID (same as the superping dialog) and automatically does all that?