First, most drug use does not produce victims. Most drug use results in no harms. But prohibition doesn't offer society, or the families of the victims any better protection than a system of regulation and control. We're talking about drug prohibition with Eric Sterling. The next question comes from Ryan72269.
Cocaine is a hard one.
It is easier to see coca beverages, perhaps cocaine chewing gum like those fed to monkeys by Dr. Ron Siegel in his famous experiments. Marijuana is perhaps the easiest in that it is most like alcohol as a mass consumed drug. Potency would be labeled. Taxes would be set. Sales to minors would be prohibited.