Excessive border patrol power has been around in the USA for ages now, it's all part of the post-9/11 package. I don't think many Americans even know they live in a zone where the border police can do shit like this, even if they haven't left the country, as international airports are usually near big cities, and they have a wide border zone around them. This stuff only really makes it into the news when it happens to one of the "good guys".