"I also believe that Marijuana/hemp/whatever should be kept illegal. From an economic point of view, making it illegal increases the cost of getting the drugs and the risk associated with it, making it far more difficult to obtain. Should the drug be legalized, the price would go down as the drug cartels start sending in larger amounts of the drugs legally, and demand would go up, resulting in many, many more people using drugs. This might be okay to you, but I do not think it would be beneficial to the society as a whole. Therefore, I say no."

The reason this argument is terrible, is I could replace Marijuana with Coffee, Candy, or any number of other legal items in our society which have dubious benefitial effects and not break the argument. Its just not a valid criteria to make something illegal. There really is no valid reason for why marijuana is illegal. It basically is just simply because some people want it to be, but that doesn't make it just. Doing jailtime for marijuana possession isn't justice. I think thats why you'll find a not insignificant portion of America simply ignores those laws and a not insignificant number of people in America would like them removed altogether.