"No-one" was a bit of a hyperbola; there was a known "drug gang" of three people who we were warned not to interact with when we were children. These three drug users were known by everyone and I'd really be surprised if there were significantly more people using any kind of illegal substances; back in the 90s it was just not that easy to hide stuff in a town of 3000 people. Also, where the hell would you even get drugs? From the three people drug gang (who presumably were buying their stuff from a bigger city 50 kilometers away)? In that case you would be seen to interact with them, which would immediately raise some doubts.

I suppose it's possible that there were some other people besides this three people gang at least trying illegal substances, but it was still marginal enough to been a complete non-problem. Alcohol, however, was different; it was legal and socially accepted and many people had a problem with it.