I find it interesting that you can't trademark a product with the term "Redskin" on it, but you can copyright a song that has much more offensive terms about ethnic and racial groups.
To be honest, I think that has much to do with the politics involved with the entertainment industry. (Ever wonder why the PC & Feminism machine went scoarched earth on Limbaugh over calling Sandra Fluke the "S-word", but Lil Wayne can literally compare a womans reproductive parts to a piece of meat.....yet no one says a word)