People saying "not wrong." Can you envision a world where NY has a $5.85 tax on cigarettes, and police enforce that law without using violence or killing people who break it? Yes? The reason Paul is wrong is because he's focusing on the tax, not the violence.
All laws are enforced with violence. Pretending otherwise is the lie people tell themselves so they can sleep at night. The business end of every law is financial ruination, life in a cage, or death. Rand Paul understands the situation, and he laments the careless creation of a black market with clumsy tax policy.
Telling libertarian factions that you don't understand the problem is irrelevant. Creating complex protocols is not going to save lives, it will only delay the inevitable conflict, especially in this instance. If you want to save lives, don't create black markets with stupid laws. Isn't this the basica tenet of the anti-drug-war movement?