I've gotten that message once too. That really irritated me because I was in line for almost 20 minutes waiting for the owner to give out fre gifts and then it looked like the owner DCed and then that message popped up on the screen.
Although I haven't gotten it for a while, I used to get that message very often. I always wonered how you could set it off.. but moving furniture around never did the trick, of course.
They usually use that when they want a room emptied because of either something a little inappropriate going on in here or a questionable room title. I think its just their way of being witty about it instead of saying.. someone is about to get in trouble or already has.