This was already a solved problem. Just get the kids use all the stuff away from parents when they are between 14 and 18. Yes it will do a little bit of brain damage, but getting pissdrunk at that age and having your parents nurse you back to normal is a great experience for a kid. I know this from first hand experience, when I was 14 (it was sorta normal in the Netherlands at that time). I was a lot more carefully with any substances afterwards. As for addiction: kids are getting addicted to their phones and games all the time.