No, that's not really true. I've known a few weekend crack- and smack- heads. I guess you could say they were addicted, in the sense that a person who has a binge every few weeks is an alcoholic. BTW, the crackheads had regular jobs in a factory, one was a minor union official. Another casuality of the WOsD is the lack of accurate information about both drugs and their users and abusers - most such studies are grant-driven rather than truth-driven. How much time, how many dollars, have been spent trying to prove that marijuana smoke causes cancer? All they have to show is the claim that the smoke "contains more of the [bad chemicals] than tobacco smoke", ignoring entirely the fact that chewing tobacco causes mouth cancer.