I’m 30, so we’re in the same ballpark.
Smoking was STRICTLY verboten! I remember a friend of mine getting caught in his car smoking a cig between classes. They made him write an essay and suspended him for 2 days as well. Hell, we would get detention if we were caught with a beeper or a cell phone (they weren’t ubiquitous at that time), and don’t get me started about the penalties for chewing gum!
Gum was tolerated, beepers were a no-no (cell phones really hadn’t hit yet).
Smoking penalties got much worse as I went through school. My uncle who graduated from the same high school I did in 1980, 15 years before me, said they used to smoke WITH the teachers back then!