What if it is not to feel happy or they belong. What if it is just to feel differrent form the normal state of consciousness. Do you have the same opinion about alcohol or does the fact that narcotics are illegal influence your opinion?
I personally see no difference between someone getting loaded (booze) or stoned (the kind). I do worry about not fully developed 16 year olds getting involved with stuff that is too powerful for them to control. It is just a matter of maturity and some 30 year olds are not mature. That said this a parental problem and not a governmental one.
Smoke 'em if you got 'em