Second that.
My guess is that "intelligent people" are more likely to see trough the "If you touch that devils marijuhana cigarette your gonna end up with a needle in the arm, boy" and have a higher curiosity towards things that make them see things differently.
It would be cool to see some data about what drugs higher intelligent/educated persons tend to use. My guess is that weed, coke, LSD,Mescaline,Psilocin have a somewhat higher user base than say Opiates, Meth and stuff that actually can turn your life around for the worse very fast.
I shall investigate with a poll. :)