As stated in the Good Copy Bad Copy film, copyright laws have become very powerful, and arguably to the point that they inhibit new creative works. There is really a fine line between sampling and parodies. I find someone like Weird Al Yankovic far less creative than the people who use the sampling method and create something very unique such as Danger Mouse in his Gray Album. In this case he was not making a profit and neither the Beatles nor Jay-Z was losing a profit, so I fail to see much wrong with it.

There is also the issue of each download being a lost sale, and this is clearly not the case for most people. I know very few people who will go out and buy a CD if there is one song on it that they like, they would however download it. At the same time if there is a great album out, most will give the respect to the artist and buy it.

The bottom line to me is that if there is a case where the artist is losing money , or someone else is making money by using the original artists work, this is wrong, but its generally harmless otherwise.