Afghanistan has free flowing drugs and most other things we outlaw in our society such as pedophilia and laissez faire murder. In theory it is a libertarians paradise.
Not even remotely. Libertarianism is not just wanting drugs, pedophilia, and murder. Murder is certainly off the table for any libertarian, and I suspect most would agree with me that any sort of sexual conduct with children constitutes violence.
Why would libertarianism consider sex with children violence if it was not coerced? Many things we consider heinous become lawful if non coercion is the primary criterion.
Afghanistan does show that complete lack of government involvement is also a bad thing. Libertarians come across as if government involvement is the root of all societal problems.