My parents don't smoke any more (so far as I know...) but were active hippies back in the day. When I came home from D.A.R.E. class in 5th grade every day, having recieved a lecture on "just say no" and "drugs are evil", my parents would sit me down for a counter-lecture on personal freedoms and responsible decision-making. The best advice my dad has ever given me was, "Always question authority."