When you steal something from a store, you are necessarily depriving some other person of that particular item. If I walk into Best Buy and walk out with a stolen eMachine, that's an eMachine that somebody else will never have. Granted, I'm sure there are those who would classify depriving somebody of an eMachine as "good Samitarianship" - but you get my basic point.
It should be needless to say, but by downloading the game through piratebay, I am not directly depriving anybody of that game*. So the two cases are different enough that you can't really take a "good for the goose, good for the gander" approach to this.
* - I suppose one could make the argument that by grabbing a working CD key and registering it online, I may be depriving somebody of that CD key. It'd be a technicality, but this is slashdot, after all. What remains, though, is that the eMachine in the above example is a limited resource by its very nature. The CD-key is an artificially limited construct, and while perhaps similar, I still do not feel the two situations really equate.
