Private Clubs

My cousin's children created an exclusive club when I last visited them. Every few minutes they'd post a messages on their door. One message wrote "mom and dad cannot come in," one message excluding "everyone else except Aiden and Trinity and Amanda" and as I watched, they were compsoing a new sign saying, "Trin is not in the club for right now! You can come back later..." Shortly after I was blocked from the room and the girls' sister, Trinity was pulled out.
From what I could tell, this exclusive club's only purpose was to post messages excluding everyone else. It was very funny.