If all drugs were legal, addicts would no longer pay black-market prices to criminals for drugs of questionable and dangerous origin. They would get drugs produced by legitimate pharmaceutical companies and pay market prices. They would no longer die from buying toxic drugs, and they would no longer have to mug innocent people to support their habits.
If all drugs were legal, addicts could seek help by going to doctors - no longer afraid of being prosecuted for their medical problems.
If all drugs were legal, criminal drug dealers would no longer be on our streets. They couldn't compete with the low, free-market prices for drugs sold at pharmacies.
If all drugs were legal, criminal drug dealers would no longer prey upon our children - any more than distilleries and breweries try to infiltrate schools to hook kids on alcohol. When I grew up in Los Angeles in the 1940s, the worst schools were safer than L.A.'s best schools are today.
If all drugs were legal, our government would no longer be dispensing propaganda that makes children want to try the forbidden fruit. - Populistamerica.com
I typically don't consider myself a social libertarian, but these are convincing arguments!