We are looking at the positive side of things here. What if the student was very unruly or showed poor sportsmanship or, just sucked no matter how hard you try to teach him? This reflects badly on the school but in particular to the owner of the school. No one ever says "Yeah he is GM John Doe's student, but it is really Jeremy who is his teacher." The owner of the school may get a lot of the glory but he gets all of the criticism for bad things as well.
When you teach a class in a school that is not yours, do you teach whatever you want, how you want? Or do you teach the owner's curriculum how he wants it taught?
To your first point, it is the Master's responsibility to decide who is and is not involved with his school. That includes students and teachers. If there is an unruly person involved with his dojo, it
is his fault and he
should get the criticism.
To your second point, I am in this situation exactly. I am a paid instructor at the martial arts school of a friend of mine. I teach his curriculum, how he tells me to, in the order he desires. Because it is his school, with his name on the sign. I speak up when I think I have a good suggestion, and I offer my input on curriculum. He hired me to teach karate because he knows I am good at it, and part of what pays for is my perspective. But he's the owner and the head instructor. He get's final say on everything at all times and I make whatever adjustments to my instruction that he requires.
Basically, he has a set curriculum of techniques, class themes, drills, exercises, and training methods. I teach that, as he instructs, supplemented with my own knowledge and method. I send him copies of my class plans ahead of time so that I can make whatever changes he wants, and we go over any specific adjustments that need to be made from night to night based on attendance or tests or whatever else can come up.
In the end, he's the owner of the school. If I wasn't willing to teach things his way he wouldn't have me in his dojo and I wouldn't have any right to be there. It's the owner's
reponsibility to control what is taught in his home on his floor. If I owned the school I might do some things differently.
But I don't.
I think it's important to remember that.
-Rob