I disagree. The government would tax it to death, the trial lawyers would sue everyone who makes it or disributes it. It would Cigarettes II.
There is only one way to find out. Legalize it. We already know the war on drugs isn't working. Let's see what happens if we start to legalize certain drugs and see how it affect crime etc. The question is, are you the type of person that would actually change his opinion on the matter if he was proved wrong?