/sarcasm/ everyone should be taught:

how to handle a gun

how to intravenously introduce narcotics

how to smoke tobacco, hash, crack

how to enjoy pornography without guilt

/end sarcasm/

point being that there are limits to the philosphy of "know the enemy".. Recent prominent child porn rap(s) in the UK have shown the "it was only for research" defence does not wash.

HOWEVER, ethical hacking is really useful, a powerful teaching method, in my opinion, therefore certainly in the realm of that which should be taught. Concerns about younger students 'going off the rails' can be mitigated, at least in terms of consequential claims made against the teacher / establishment, by requiring all candidates to sign a disclaimer to the effect that they undertake not to exploit the techniques that they are taught 'in the wild'.