I agree with DuB.

That old 'it's not like stealing you made your own copy lol' argument really is very silly, because the value of media is not in its physical worth anyway. The value is in all the money it took to create the media.

If you invested money in sound equipment and a band and remade an album, then you can say you have effectively copied it.

Just copying the disc and saying 'I went to the trouble of paying 2p for the creation of the disc; that's all the creators did too so it's mine, right?' is obviously not logical.

Your assertion that you were never a potential customer is patently not true. Saying 'now I've taken their product for free and discovered I liked it I might buy another from some vague other person in future' is just like saying 'now I've taken your apple for free I discovered I like it etc.'.

You're basing your arguments on the axiom that you have the right to experience an entire product before you buy it; you don't.