If we're talking about black markets for cigarettes, then I understand that usually these are standard legal cigarettes. The illegality, the smuggling, derives from buying the cigarettes in a lower-tax jurisdiction and reselling them without right in a higher-tax jurisdiction.

So these bootleg cigarettes are not any more harmful than the convenience store cigarettes you normally lay eyes on. Like the inter-Scandinavian alcohol smuggling business, I guess, an organized extension of what drives private Finns to buy booze in Estonia and bring it back to Finland for personal use. But ciggies.