Click on that picture up there under the words "Ask a cop for direction" One of those former cops relates a nutshell rendition of the history of drug addiction in this country. Regardless of the letter of the law regarding whichever substances and regardless of the relative level of hysteria surrounding them, addiction rates in this country haven't changed significantly since before Harrison, which was the first law criminalizing certain drugs.
People are driving, fucking, fighting and raising kids on these illegal and them other legal drugs right now, even though some of them are illegal. That hasn't changed either, with prohibition. The only thing that has changed since the day when anyone, even a minor, could purchase heroin, laudinum, cannabis preparations or cocaine w/o a rx or question from the local soda fountain or Sears catalog is that now we have a drug war budget, drug crime, drug cartels and drug corruption.