I did consider standing up on a table at some bar in Amsterdam and offering a confidential / discrete cargo shipping service across the water, at 150kt.
On further reflection it didn't seem a good idea because people other than the intended customers would prob99 hear about it.
No wonder these people get caught. If you are going to ship this stuff, you buy (or steal) a boat, enough fuel to cross the water, and you do it during a nice calm night. And you leave the boat on the beach, or make a hole in the bottom...