Hello, that's my first post, I'm a lurker, but as this post discussed something happening ni the country I live in, I decided to participate.
I personally think that those pictures are staged.
It was taken in a state named Acre, in the border with Peru. It's IMPOSSIBLE to have an untouched tribe there, that have never had any contact with civilization or with other tribes who already contacted us. The state is relatively small to Brazilian proportions and have at least one big city, named Rio Branco, plus a population of almost 1 million people living in that state. There are also army bases, wood and rubber exctrat manufactures working deep in the jungle, etc...
A lot of Brazilian "indians" have cell phone, satellite tv and some of them even have small airplanes and trucks. They earn rivers of money in contraband of wood, illegally extracted from their reserves.
The most important thing is: those pictures came out exactly at the same time as a proposition from the federal government to give, to a tribe of only 12,000 indians, a huuuuuuge part of the Brazilian territory in the state of Roraima (bigger than most European countries) full of gold, silver and other valuable natural resources.
Roraima bords Venezuela, which raised controversies about a possible lost of national territory, in the future, to foreign governments. The indians are supported by foreign NGO's and by the UN. Already 13% of the Brazilian territory (110 million hectares) was given to less than 500,000 indians. Non-indians are being removed by force from those territories, even people that claim to have property of the lands, from generation to generation, for more than 150 years.
Sometimes, things are just not what they seem.