It wasn’t diapers for me in my youth, it was plastic pants. And yes I used to “swipe” them (my grandfather’s term for stealing that seems to take some of the guilt away from the act). Anything from grocery store (that used to stock mostly Gerber brand), to department stores, to clotheslines, to baby bureaus, to diaper pails weren’t safe when I could find plastic pants there. The only place that I never considered taking them from was right off a baby’s butt. Fortunately I quit doing this years ago before I got caught (other than being caught by an older lady, that was babysitting, when I took some plastic pants, that were drying on a clothesline, which only proved to be embarrassing with no other repercussions).