That whole sovereignty thing goes both ways.

Apparently the Mexican people and government don't think so, though...

Without leaving American airspace, remotely piloted surveillance drones — outfitted with cameras that provide real-time video — fly along the Texas border searching U.S. territory for drug smugglers, illegal immigrants and potential terrorists.
They also are fully capable of peering into Mexico, where narco terrorists eviscerate the rule of law.
...
Although U.S. narcotics agents long have been in Mexico, there also has been public outrage of anything more intrusive.
“We have come a long way in terms of cooperation, but there are areas that still test Mexico's traditional notions of sovereignty,” said Tony Garza, the former U.S. ambassador to Mexico.

How nice. They get angry when they perceive Americans to be intruding on their sovereignty, but they have no compunction whatsoever about intruding on American sovereignty in several different ways, from protesting tougher immigration laws and border controls to agitating for gun bans. I realize the culture's different down there, and I suppose that's what Garza was getting at when he referred to "Mexico's traditional notions of sovereignty," but it'd be nice if Mexico stopped meddling in our business as they think our government is doing when the government shifts the drones' cameras slightly to the south. It strikes me that such is a hell of a lot less intrusive than their citizens and government officials coming to our country and demanding we change our laws to suit them.