@mike I like to include: free as in “puppy”.
some countries used to allow tobacco companies to hand out free cigarettes at places where students and other young adults hung out (even as recently as the 2010s in Germany and Switzerland!)
@mike
That sounds like a good idea regardless? Showing kids how to make <foo> is IMO only bad if <foo> is a dangerous thing that they can successfully make (or unsuccessfully in a dangerous way). I don't expect any kids to make cigarettes from scratch after learning how tobacco farming works. Do you see any other reason telling kids about tobacco farming is bad? (Or do I misread your subtext?)