Agree with Oleo. Make it legal, doubt it can be worse that cigarettes/alcohol from a health standpoint. Put an age limit on it and some information about possible risks.
People who is intent on self destruction will do it anyway with any means, legal or not.
What should really be taken off the streets is guns. They always seem to end up in the hands of mental ill people and teenagers out to kill their school mates.
Make love not war.......
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Men, this is no drill...