I think they deserve to be left alone the same way we leave other groups like the Amish alone. The question I have is would it be unethical to use surveillance and modern technology to record their language and culture for posterity while not interfering. We could use linguistic families to quickly understand their current language and from that we might better understand how to incorporate them into the modern world (if we find exactly how big they consider their region to be, what they consider sacred or how they discuss their limited interaction with us)