Interesting idea. At first I had no idea what they were hoping to accomplish with this, but after giving it some thought it might have some sound economic theory behind it, in that, given that the price of drugs tends to dramatically increase or decrease with even relatively small decreases or increases in the quantity available, they may be hoping to decrease the price of heroin and, in doing so, reduce the amount of heroin-related crime that occurs.
We'll have to wait and see how this develops.
What's the marijuana party position on this issue?