That is rather fraud than an unethical thing to do.

I have heard of people making good money selling printed t-shirts in Europe. No fake desginer shirts but custom ones. During my studies I thought about importing beer condoms and having a brewery add them to a crate of beer. Imo a nice give-away during a summer promotion or during World Cup. Howsoever I did the math and didn't have the balls to give it a shot. I don't regret it though. Otherwise I would try it now instead of writing it down. Nevertheless I still think it is the "rubbish" that is most profitable.