...standards of behaviour both inside and outside school that are appropriate...

I am sure that the Taliban and the Ku Klux Klan would agree with that one. The point is, whose version of what is "appropriate" is to count? Imagine this being applied on the basis of some past traditional notions about class and gender and race...

Ah, but that's all past history? And how far can we be sure that there aren't aspects of the way we are today that in a couple of generations may well be seen as equally horrifying?