Lets state a fact right at the start. Telling anyone that something’s ethical is a direct insult to them – and a blatant attempt at mind control. Here’s why:
a. It assumes – and states – that the hearer doesn’t know yet what is ethical. Or flouts it deliberately. Calls them a fool or a knave by even introducing the subject.
b. It states by implication that the teacher is in control of what the student will learn. Worse…it implies that the teacher is ethical. With no proof ever asked or offered.
c. It calls into question – by the fact that the subject has been raised – the past behaviour of the hearer. Had it been ethical, would this statement have been made?
Okay. We’ve established that there’s something here about which you can be mightily offended. If you’re 18-27 years old this is all you need to go off and have a good time. You can be a virtuous victim. Enjoy. Knock yourself out.
If you are older than this you need to look at the problem of what to do when you really do know what is ethical and are thrown amongst those who do not. It may worsen – you may be amongst those who do not know good manners either. In the former instance the law and the police will back you up but in the latter you are left to Heaven. And Heaven has off-days.
The most sensible ploy is to abandon morality and ethics altogether and fall on the nearest victim red with tooth and claw. If you don’t feel yourself capable of this, slice small slivers away from morality and use them to lure the victim to their salvation. Allow them to be bad enough to injure themselves and feel it, and then offer the balm of not having to do it repeatedly. The wiser ones will seize upon the idea.
Or invent a system of ethics that will allow whatever particular behaviour you probably won’t be able to eradicate anyway, and then license it. They’ll feel strengthened in their folly and you’ll get a nice little earner. This may not be ethical but adjust that when you next have time.