[HansTWN]

I am no lawyer (I suspect neither are you). But as far as I know, if someone does not have legal rights to transfer something to you, anything, then you cannot take legal ownership. The only exception to that rule being money. Meaning somebody buys your car and pays you with drug money you do not have to return the money. If he exchanges your old Corolla for an illegally obtained Ferrari then you have to return the latter and sue the drug dealer to have your Corolla returned.

As for the bootleg DVD or a fake Nike T-shirt they could confiscate them, but that would rarely happen in real life. And even though most people that buy fake T-shirts do so with full knowledge but but that is hard to prove and nobody will sue you due to the negligble value. What I would like to see is just a sense of right and wrong. If you know it is not the real thing, just don't buy it! Of course, in the Amazon case you are getting your money back, so you have not really been harmed. Probably even finished reading it, so it was the same thing as a friend lending you a book.