My dad was a full blown hippy in the 60's, went to Woodstock 69, protested war, all that jazz. He stopped quit doing hard drugs after getting into Stanford Grad school but would still burn occasionally. Now he won't because he is my mom's bitch.
In terms of parenting, I am proud to say he raised me responsibly. He trusts me to have thought out any decisions I make (I've never tried hard drugs, don't plan too) and is relatively OK with me smoking, he just doesn't want my mom to find out.