Decriminalization of drugs is recommended by the World Health Organization and is working in at least four countries, including Portugal, the Netherlands, Czechoslovakia, and Australia.
http://theinfluence.org/these-four-countries-prove-that-decriminalization-works-better-than-prohibition/
Giving someone a criminal record for using drugs only increases the reasons they turned to drugs. Which of you bellowing for punishment of those you feel superior to has not been dependent on non-nutritive substances at one time or another? Ever need coffee in the morning, or a cigarette? I have, and so for that reason do not judge. If you are pure as the driven snow then good onya, but the majority of your fellow citizens are not so lucky, or strong.  Judge not lest you be judged. What flaws in your life would we find if we could see inside it? Prison costs more than an Ivy League education, and the latter would help someone more. You are cruel people, and will reap what you sow.