Even today, life in small villages in Ecuador are characterised by almost complete isolation from the rest of the country, minimal access to education and material things from the developed world. Consequently, villages habitually leave boulders and chains across their roads at night to prevent outsiders from driving in and rustling their livestock. If there is an protest or disrespect from authorities in passing through their land, they do not hesitate in throwing up roadblocks and even aggressively barring entry to anyone including police, officials and tourists alike.
In short, this is a very delicate, sensitive environment, that they will protect if it there are any signs of being threatened
Here is a picture courtesy of a great photographer Matthew Barker