Typically the John Walters of the world and the organizations they run want you to lie to your kids about the dangers of pot which in turn makes them think you are lying about how bad meth is. and meth is VERY bad.

What this shows me is a drop in drug use of any kind not because of overly protective parenting, but because of actual parenting to begin with. Spend some time with your kids and be interested in their social life. Do that and they won't BOTHER with 'drugs'.