I’m from Portugal and here is what has happened here:
In 2001, possession of small quantities (hash, for example, 5 grams) is not a criminal offense anymore — instead, it is a (I lack the word) that only forces you to (in practice it doesn’t happen if you don’t look like a loser to the cops) they take you to special services with psychologist and they give you a chance to go do rehab.
If you don’t want to go to rehab, it’s up to you — they let you go.
What did this do? — and let me clarify this was done with ALL drugs — traffic did not increase, consumption did not increase, but crime sure did DECREASE.
People are less stigmatized and just that has a significant psychological effect for some — they don’t feel they are criminals anymore just because they want to smoke some pot — hence being “crime virgin”, in opposition to the US where unfortunately an otherwise law-abiding citizen becomes a criminal just by indulging in his/her intoxicant of choice with no harm to others.
Inprisonment threat doesn’t stop anyone from doing drugs as you surely know in the US.
Inprisonment relief didn’t cause an increase in consumption here either.
We still chase dealers, especially the “big fish”, but even that I am hopeful will be a thing of the past in the next few years.
If you take the names and the stigma out, and just stick to the facts, you will see that there is no difference that justifies alcohol being legal while other drugs are illegal.
I don’t say make alcohol illegal — while I am totally for prohibition of drunk driving and other dangerous behaviours — what I am is for education instead of repression.
This should be enlightening:
http://news.bbc.co.uk/2/hi/health/6474053.stm
http://video.google.com/videoplay?docid=6108672696241807159
Wish you all free, responsible, happy lives :-)