LEAVE THEM ALONE!!!
Don't go and study them. Don't go and try to convert them to Christians. I think that we should internationally create a no fly zone over their portions of the Amazon. They obviously are happy where they are and I am sure that Nike Hiking boots would suit them for the hunts. But they have not had contact with outside society and probably do not have drug problems or racial hatred. So just leave them alone.
Check out Cnn.com for the story.