Well, not too long after 9/11 a guy in a rented minivan was sitting at the side of the road by our local airport with a camcorder videotaping the gates, enterances, fancing, aircraft coming or going, and any buildings nearby.
Local police reation?
"Nothing to see, move aong. Just some quirky man with a camcorder fetish."
I sometimes wonder just who the videotape was for, who that guy was, why he was doing the taping and where he is now.
There's actually a large number of hobbyists who "collect" sightings of specific airliners.
Incident where a British one was arrested by the Greeks or something a couple years ago, I think....
Did they at least talk to that guy. Maybe that guy was a nut job. My fear is that they could be sending out guys just to probe us. When they think we have become to lackadaisical they will send out the real thing.