From your description, it does sound similar to abstinence-only sex ed. The only thing schools should do with regards to drugs, sex, alcohol, and all those vices that can be enjoyed responsibly, is to educate - this is what these drugs will do, positive and negative effects, it's illegal to possess it in most cases, etc.

We didn't have much or any of that, but we did have a police officer in class once showing us a block of hash. IDK what all that was about though, we just thought it was cool to have a guy with a gun in class, :p. (note that this is in a country famous for its tolerance towards weed)