You know, while smuggling certainly is important for the careers of many a Junker, keeping that appearance of legality can only help such a situation. So while it seems like Bornholm isn't particularly smuggler friendly (despite its borderworld locale), you know there are always Junkers on board who can, shall we say, take care of business, yes?
The same goes for Kreuzberg; If you have some cargo that is, hmmm, underappreciated by the local law, just ask for Karl in the landing bay and tell him I sent you.