Earlier quoted context omitted.
Well, how many people will see this headline and rush off to a back alley to buy a shot of heroin from some junkie?
Dunno about you, but I have never bought drugs from a junkie, but, of course, through dealers, who - in my experience, more often than not - do not actually use many of the substances they sell.
Most people that fall into heavy addiction are probably driven there more by chaotic circumstances than intellectual considerations.