DJ Shadow Samples...

He talks about how hard it was to clear rights for his work in an interview with David Krinsky/Rolling Stone:

Clearing samples is always difficult and interesting and time consuming and frustrating. It really shows you that the legal profession is really just who talks the best talk and who fights the best fight. It's just all semantics and who wants it more and who is glib and who is the biggest BSer . . . It is quite unsettling as an artist. The music that I make is a collage medium. The music industry and the legal profession need to update the way they think about samples. The way it's done now, lawyers still pretend like it's some great infringement -- an affront to everything musical, which we all know is not the case. Sampling has been around long enough. There are many classic songs that everyone loves that are made from samples. So to try to pretend that it's some sort of "How dare they!" is just silly.

Check it out. Good discussion on how he feels about downloading verses bootlegging, and why one is okay but the other, making money off artists without paying them, is not okay.