You cannot change your dojocho (whose response I find unbelievable) but you certainly can and should set the tone and limits within your own class. If you "get in trouble" for doing so, rather than than this rude troublemaker being dealt with, that will make clear how dysfunctional the dojo culture is.
In general, it is easier to ask for forgiveness than permission with Sensei. I've been taking this approach to keep control of my classes as best as I can. My approach is more direct than Sensei's.
My only thought is that this person's dream is to be a teacher. He comes to teach obviously, not train. He keeps others from training. Sometimes when I'm called last minute to cover a class for another instructor, when he hears the instructor isn't showing up I've actually had to kick him out of the high seat. (He typically sits in the back of the mat where all the beginners are..his targets.) It just comes off super nutty to me.