rather than continue this I understand your point, but I don't agree that making hardcore addictive substances legal (as in no controls) will solve the problem. Changing the way addicts are dealt with, I can see a lot of value in that - i.e. programs to rehab, not jail. Clean needles are available at any pharmacy, so that is not the issue. Addicts need help, but I don't think opening the door to dealers to sell more is the way to go. Regulations need to help addicts, not shun them, but at the same time minimise the amount of these substances becoming available.
Cigarettes are a great example, since advertising has been limited and especially the ban on smoking in public spaces the number of smokers is dropping drastically. As an ex smoker I wish these had been in effect when I started smoking I probably wouldn't have started in the first place.