The problem with these threads is that every time this issue is raised sometimes people guess who is considered indigenous based on the colour of their skin. Such as with people naming Tupou and Sutton.
Also, I think people ignore the point of people with mixed race. I mean, there may be players out there with indigenous heritage who simply would be preffered to be called an Australian rather than a 'dreamtime player'. This idea has merit, but it should be voluntary on the players behalf as to who they represent (as with internationals), rather than just lumping them into categories.