A conductor I have known for the past 40 years has started a Facebook page, which I call The Conductor's Vanity Page. I joined it because we've been acquainted for such a long time, but I stopped posting there because everyone's opinion - if it's not his - gets a rather rude putdown. It gives all the subscribers a chance to watch him pontificate and his acolytes a moment to kiss the royal butt.
It's truth universally acknowledged that there can be only one star in the room.