Originally Posted by
Martin the Martian
Except that seeing a stream of aircraft being flown sedately up and down the crowd line will get very boring very quickly for Joe Public, and probably also for many enthusiasts. We don't all carry several thousand pounds' worth of cameras and lenses as long as a MANPAD, and restrictions such as these would be the end of the air display industry. God knows it's taking a hell of a beating from the Shoreham fallout already.
I did narrow my suggestion down to Historic Aircraft only. I've been attending air displays only for around fifty years. The clear impression I have is that most carry a camera of reasonable proportions seeking the shot that perhaps justifies their attendance.