[filmgirlcw]

You're not supposed to use your camera in customs areas in airports. Some airlines get really weird about people even taking photos on the plane (though that has relaxed a lot), so it might not be against FAA rules, but I think someone purposefully recording a sleeping person would still be frowned upon and would be one of those activities that could get a plane turned around if the passenger didn't desist when asked or delete the footage.

But aside from that, I'd posit that it's actually a very different thing to have a random passenger recording you (which is still gross) and the airline (which may be owned and operated by a foreign government, which is the case for most of the airlines in the Middle East and some in Asia), which has your name, your passport number, your birthdate, your address, and other very sensitive and identifying information on file.

One is creepy and uncool. The other could be flat-out surveillance. Especially since when you travel, the government data you give to the airlines isn't negotiable (meaning unless I'm flying domestic, I can't use a fake ID and name to travel (and even that would be against the law), I have to use my passport, my full name, my address, etc.