Tret,
You're not on TV, so don't try playing doctor. You already stated you've never used mind altering substances. Nor do you ("if I go to college") have training in dealing with those who use, misuse or abuse them.
If you want to play holier than thou, go for it. That's fair game. But if you want to prescribe rehab, get a degree. Right now you have neither the personal knowledge of why people may seek alternate states nor the training to understand it in so much as in sterlized book form.
Rude? Yes. For the sake of rudeness? No.
--Mc