Yeah, my parents susally use the aloof "we never dd that crap" approach..like they expect me to believe that, they were in there 20s in the 80s.
But what pushes me sometimes (I've never cracked though), is when I go to a party, my dad will seriosuly grill everyone there for a half hour beforehand about drugs...but nothing when I go to a concert. He's all "have fun, live life." It makes no sense to me, and I've lost a few friends because of my dad (who, BTW, looks like a hippy or something) freaking out on them, even though they're clean. I always think that it would serve him right if I came home high...but I never actually have the guts to go through with it.