"Blue" wrote in message ...
It is provocative to look at something from a different angle. [...]

Well, sure...once you start talking about absurd possibilities, the sky's
the limit. Why limit yourself to three absurd possibilities?

Though, I don't really understand your #3. My point is that if *someone*
can take over an airplane by remote control, then terrorists can take over
an airplane by remote control. There's no need to "swap identical planes".
You just take over your airplane of choosing by remote control.

Pete