I don't mind regulating use of drugs based on how addictive they are-- not that I know where the line should be drawn. While someone might have felt like using the drug at some point, addiction can be a lifelong struggle. It can be hard to understand addiction's effect, especially if the circumstances when you started using a drug were less than ideal. Even the best of us don't act in a purely logical manner, free of the constraints of feelings and emotions and pressures, and there are some punishments that don't fit the crime. That being said, I have very limited knowledge about substances and their addictive properties. From what I can see, marijuana is safe enough that it should be legalized. A lot of it is cultural; we like alcohol and tobacco because they've stuck around long enough to be a part of mainstream culture (though tobacco has been marginalized).