No, you can't tell if a given cigarette being smoked is contraband or not, but buying a pack of smuggled cigarettes is a very different experience from buying a

No, you can't tell if a given cigarette being smoked is contraband or not, but buying a pack of smuggled cigarettes is a very different experience from buying a legal pack. When all brothels (escort services etc) are illegal, operators have very little incentive to enforce all sex workers being 18+, non-trafficed, getting regular medicals, whatever. Even a conscientious customer has very few options to check for themselves. If brothels on the other hand are legal, operators have every incentive to do this, and if anyone is looking for an illegal brothel (which looks very different from a legal one, just like the place you're buying smuggled smokes looks very different from a 7-11), this "paraphernalia" is direct evidence that they're looking for something bad.