@umbra21 - The problem is drawing the line. It's all very well to say that drugs should be made legal, but if you make one kind legal, that turns into a slippery slope leading to making other kinds legal.
And you can ask any kind of drug crime attorney and they will tell you how much drugs can ruin a life. For all their benefits there are a thousand pitfalls and once they are legal, anyone will be free to fall blindly into those pitfalls. I think it's better to just leave drug laws the way they are.