One more on this topic. There's a post over at that has a line that really sums up the big problem of appropriation:
I think this also drives home the point I've mentioned before of how Natives are often viewed as "fantasy characters"--something that you can dress up as, play pretend. Wizard, Princess, Indian. The problem is Natives exist, we are real, and putting Native people in the fantasy character category erases our current presence as actual human beings.