I think these guys have not thought about the consequences of their contact with previously uncontacted tribes can cause. The tribes do not have immunity to the illnesses the outside world people carry. This can devastate and literally kill off whole groups of people, just by their presence. Their needs or should I say wants are selfish. Just as long as they are able to do and get what they want. No matter what will happen to these beautiful tribes because of their ignorance and arrogance.