I'm not sure what you're trying to say. In what way does the drug policy you describe differ from the libertarian drug policy?
There is no "libertarian" drug policy there is a libertarian stance on what that policy should be. The drug policy the libertarians espouse can never be implemented in this country without inevitably becoming a liberal playground of drug treatment and victimization. The drug issue is just a minute example of why the libertarian "solution" to governing would end with a liberal outcome. The only way to have a libertarian society is to put into place a rigid "social Darwinism" that once in effect would cause a massive backlash.