Makes perfect sense to me, drugs used for medical reasons in a controlled and prescribed manner is perfectly normal, people walking around committing crimes and under the guise of being high as a kite is not acceptable. Are you suggesting we legalise anaesthetic's used by surgeons to self administer too. Drugs that are giving the user hallucinations and is sat on a bus or train next to you, be ok with that would you?
The nutter who's necked a bottle of vodka. Is he legal?
