It would be well accepted if Admins and/or select users could be hidden from the chatroom user list in the same manner they can be hidden from the buddy list.
I saw this same recommendation in 2012 and no further comment or discussion on it. Seems senseless to hide in the buddy list but not the chat room. It defeats being hidden and in some cases it prevents appropriate monitoring of the chat rooms as people are hesitant to show their true colors or even carry on a conversation, noticing that there is an admin in the room.