Sorry it's staying off topic but this is close to my heart aswell. Even the legal drugs are just as lethal, if not more so in recent years. More and more people are having "accidental" drug overdoses off prescription pills. Look at the list in recent years from celebrities such as Heath Ledger, Brittany Murphy and Anna Nicole Smith (okay, maybe not Nicole because she was a walking chemist!). Drugs like Oxycontin, Vioxx, Xanax and Stilnox have increased in use and the amount of them being taken as cocktails has also increased which have brought about these deaths.
A lot of good results come from supervision rather than prohibition. In Sydney, they have had the drug injecting gallery open for nearly 10 years now and they have had over 11,000 people inject themselves on over 500,000 seperate occasions and out of that they have had 3000 overdoses but NOT A SINGLE FATALITY!! The quick response from the staff there ensure that while the quality of drug can't be controlled, the reactions suffered as a consequence can be controlled very quickly and as a result, everyone that walks in there walks out of there again. In countries like Sweden, they actually have synthetic heroin which gives the user the same euphoric feeling they get when they have the real drug but is 100% pure to ensure that no overdoses occur and they also have supervised galleries.
As for weed, they should've already legalized it and made billions from the hemp industry and the pothead industry would be less than 1% of the money they could make from all the hemp products they could manufacture. You'd find people farming it for the material and creating cannabis crops which are close to THC-free which is currently happening in several countries.