Yesterday we were at a local Long Island airport, Republic Airport, a place that we've gone to many, many times over the years. While there we usually watch planes (mostly those with prop engines or even some corporate jets) arrive and depart, and if we can get a clear enough shot we'll even take photos of them. It's a public airport, owned by the New York State Department of Transportation, and we were parked in their parking lot alongside a fence where a few hangars are located. A Cessna 750 Citation X had just landed, and being that it's a nice-looking plane we thought we'd take a few photos of it. Michael took a few photos through the fence that was directly in front of us, then returned to the car.
About a minute later an airport employee came over to us and told us that we're not allowed to take photos of the planes, so I asked him why. He said that there are private planes there and we're not allowed to take photos of them because we might get their tail numbers in the photos, though he didn't say we can't photograph the tail numbers but rather can't photograph them at all. That didn't really explain anything but with today's heightened paranoia I didn't want to push things and end up in jail, or worse.
So, is this what airport security has come to - we're not even allowed to take photos of planes from the parking lot? Any thoughts or stories of similar experiences would be nice to hear.
Oh, and here's one of the photos taken:

http://www.pbase.com/marchael/image/47942368