Say what? The black market is completely defined and dominated by the heaviest form of government control, literally men with guns kicking down your door.
By that definition, the black market is a free market. You could argue about the word 'unrestricted' but I doubt you'd change my mind.
The bakery competition is limited to people who want to run a bakery. The beer store market is limited to people who want to run beer stores.
Breaking the law obviously isn't an issue for people in drug industry.