I find it hard to grasp why you feel you can dictate the policies and procedures of private enterprises. I once worked for a privately-held company that required signing and abiding by a Judeo-Christian ethics agreement, as well as drug-testing. Employment was "at will" and could be terminated for, among other things, adultery or drug use. It wasn't restricted to on premise conduct. Evidently this school employs a similar policy for parents and students.
Move along...