Where i grew up and in the time period (42) there were very few drug users about. The guys 5 years previous were total stoners, so being a rebel you DIDN't. There are very few people my age though compared to the general population due to the pill, and it was sort of the beginnning of the smaller family trend, so you didnt have a lot of older siblings to induct or buy for you, and the economy sucked so everyone was broke at the time you usually start. Also culture was pretty awesome (mid eighties highschool) tv, movies, music were pretty outstanding at the time. But I think the real reason was VIDEO games happened. There was no need to get high, because nobody left home, you sat in front of the tv and played videogames ALL DAY. By the time I got to University AIDS had pretty much ruined sex, so not a lot of people were doing the Saturday night fever thing and without the club scene there was drinking but nothing really serious like street drugs...we just hadnt been brought up on it like say my older brother.
The kids a few years younger were back into it but for a few years after the pill came out, there is a kind of angelic generation that from what I saw at least were pretty sober. There was always some pot around but I never really heard about it much, and didnt really see it again til i was late 20's when it was everywhere again.
I took physics in university...you dont need artificial drugs, you have math and reality to mess with your mind.
I mean really, who needs hallucinogens when you write an exam where THIS is an answer: