I tried to give up and I can't. It's just too frustrating.
I...I don't know what to say anymore, and I don't understand where you are coming from. You aren't even old enough to drink legally, and judging from your arguments I feel like you don't spend a lot of time around people who do drink and smoke. And if you don't want to, that is your choice, but I feel like you might want to see what it is all about before you write it off as dangerous.
I have been drinking alcohol since I was way too young, but I have never ever hurt myself or anyone else. My friends drink, but we do so safely, in our homes, at parties or sometimes at bars or clubs so long as we have a designated driver or some other form of safe transportation. The majority of people drink, and the ones who hurt themselves and others when they do tend to have much more serious and deep seated issues. And as for smoking marijuana, no one hurts anyone when they are stoned, and the same thing applies, the people who have a "problem" with it already have issues, and if it wasn't that it would be something else.
Most people make good decisions most of the time. And everyone does something dumb now and then, but taking away the right to make those decision, decisions that people make anyway completely contradicts the principles that America is founded on.
Humans are not the only animals that enjoy altering their perception, monkeys get drunk off fermented fruit, cats go crazy for catnip, people just want to feel good, and who is to tell them that they shouldn't.
Yes, make good choices, don't put others at risk, but relaxing with a glass of wine on a Friday night lowers your blood pressure, slows your heart rate and does all kinds of things that help you to relax.
Stress is dangerous and causes all kinds of emotional, physical and psychological problems. Ban stress!!!!