As the autocrat of the event I have told royals to get their butts out the royalty room and into their chairs or be prepared to pay the $500 late fee we were going to get for being offsite late since said royals were waaay late. It comes down to the fact you only have as much power over people as they grant you so if they want to be dweebs they will be. Some can be reasoned with but the ones who are the most heinous won't be. I believe in karma though and that bad behavior will come back to haunt them later.