The legal penalties for selling drugs to minors need to be increased. Prohibition is extremely expensive to enforce the money could be better spent on education and treatment. Tax payers do not want their money spent on treating hopeless drug addicts. It is fundamental to our society that we consider adults to be intelligent enough to make decisions for themselves. Most people are not sufficiently aware of the dangers of drugs to make sensible decisions.
Drug use has no victim it is a consensual crime.
No-one else is affected if someone chooses to use cannabis in private. Drug use has many victims including the families of addicts and innocent people killed by drug-crazed monsters. The NHS must pay for junkies' treatment. The prohibition of any drug is a violation of human and civil rights, an unwanted invasion into privacy and compromises freedom of religion. Drug prohibition is for everybody's good in the long run.