Countries yes. But, in the OP, it's about a local region within Mexico. The checkpoints are created not by the federal government in Mexico, but by some people

Countries yes. But, in the OP, it's about a local region within Mexico. The checkpoints are created not by the federal government in Mexico, but by some people in a local region. My point was that, within the US, a city/county/regional government would ultimately not be allowed to do this. My comment was not about the US Federal government. As for DUI checkpoints, though they are conducted by local law enforcement, such checkpoints do not ask people the same questions as the checkpoints in the original story and they do not exhaustively stop and check everyone on all the roads leading into a region. So, I'm not seeing a serious criticism of my original comment.