It really comes down to this, should people be free to do what they want to their bodies? Or should the government make laws against and penalize people for doing things to their own bodies?
I vote freedom, there will be death and chaos just like there is death and chaos now regardless of the legal status of drugs.
Human behavior is hard to control with laws, the real issue is an ignorant populace that can't handle freedom.
Besides I think that marijuana should be treated just like alcohol. Taxed the living snot out of, age limit, and you cannot drive under the influence.
Short term and long term effects of it are nowhere near as bad as alcohol and tobacco usage is. You rarely hear about a violent pot head or someone crashing into a car full of innocents.