Well, one often hears stories that the price is all artificially high, whereas in actuality it is determined solely by supply and demand. As an example, cannabis costs the same whether one buys it on the street or walks into a government-approved cafe for it.
Al Capone's criminal organization pulled in something on the order of $60 million a year during alcohol prohibition, corrupting vast swaths of government and law enforcement, and America got its first exposure to "gang warfare:"
What is it about this kind of social pathology that so enchants you? Do you think it's better than however many people masturbating themselves to death on chemical orgasms without the benefit of a Government bootprint on their door?