Prohibition is the problem. The user is trying to exercise his God-given right (to ingest harmful things into his own body - french fries, donuts, alcohol, drugs) in the only way available to him. The street is the only way for certain products. If drugs were legal, there would be no real profit in the production, trade, smuggling, etc. The cartels would be out of business - at least this business. And the people would be more free - which is one of the few legitimate goals/functions of any government.