You simply get rid of the dopers, the demand goes away, so does the dope dealer.
Show people just where their cocaine comes from:
Man Swallows 85 Condoms of Cocaine to Smuggle to France (The Beaumont Enterprise ^ | 7/27/10)
It took five hours and four minutes, but a suspected drug trafficker finally surrendered the spoils: 85 condoms of cocaine he allegedly swallowed and intended to smuggle from Houston to France....The 42-year-old citizen of the African nation of Togo gave up 2.2 pounds of his illicit cargo while sitting on a special no-flow toilet under the eyes of federal agents and doctors at a local hospital.
Certainly would give pause.
A lesson, apparently lost on many, from the era of alcohol prohibition was that since it was “in for a penny, in for a dollar” very few drinkers and smugglers dealt with beer. There was a little wine, and much, much moonshine and bathtub gin. These were not arm’s length transactions between capitalistically competing seller and buyer; the dealers used every means fair and foul to fuel demand and to keep their users. As a case in point, Mexican cartels today know no “honor among thieves” but are forever getting into deadly spats over “sales territory.”
Back to the theme of alcohol prohibition: once it ended, the alcoholic beverage consumption profile slid back towards the beer end of the spectrum.