Oh OK well I addressed that point two posts earlier. In short, most people who are now in the drug are not in a position to switch to other forms of crime. So overall the number of crimes and the number of criminals must go down. I have no data to back up any estimates onto how much, but I'd guess that something in the magnitude of 75% of all current criminals who commit crimes because of drugs now will not switch to violent crimes (let alone to fraud, for which - let's be frank here - most petty criminals are too stupid).