=] Thats a good point
For me, I get shut down a lot because I've never tried them, therefore I can't have much of an opinion on the matter. Irregardless to what I did and didn't do, I've been exposed to most illicit drugs, and have seen what it does to people and what it does to their lives.
In my opinion, to put this in a comparison, the ones doing the drugs are like rats in a cage, given drugs, and observed by the scientists. The scientists can always draw accurate conclusions, while now the rat has been influenced.