It sounds like you're advocating slipping your children some drug without their knowledge, in order to prevent them from doing cocaine.
Protip: My mom slipped me anti-depressants while telling me they were "vitamins". When I found out, I never trusted her again. Ever. I felt violated. Do this at your own risk.
Protip #2: If they want to do cocaine, you're not going to be able to stop them. I don't know the answer, but slipping your kids some anti-drug drug probably isn't it.
