Difficult question. I've no conclusions myself at present, so I'm very interested to read the various arguments people will put forward.
Its always hard to sift throught the highly subjective and the propaganda on the drugs issues. One thing I am sure of though is that I'm really glad not to trapped into an illegal and expensive addiction. That must be terrible.
I do border on having a problem with alcohol though - and I'm pretty sure that easy access to any other addictive drugs would not be good for me....

Kris