Or at least don't let them borrow obscene amounts of money to pay for it.
The whole student loan debt crisis wasn't "real" for me until I met a woman who was a couple of years out of law school, 200 grand in debt, and unable to get a job which could come close to servicing that debt and providing her with anything better than just above poverty lifestyle. Yes we all read the stats, but it's easier to comprehend when it's actually personal.