It's not just at the border, it's all over the country.
"The agency projects that 30,000 drones could be in the nation’s skies by 2020." Drones over U.S. get OK by Congress - Washington Times
1984. Cliche, but it's here. I read an article yesterday that stated an average person in the UK is digitally recorded a dozen times a day, more if they use email and social media frequently. Coming to a town near you: Watch what you type! Surveillance cameras so strong they can read text messages | Mail Online