All good points and when you start to add all the variables up that would be required for the conspiracy to be viable, you end up with something that makes a Rube Goldberg machine look like a child's ball and cup game.<quoted text>There is another problem. They don't need hijackers either. It is so easy to debunk the cell phone problem.
1. Some people have used cell phones on planes. Verizon seems to work better.
2. Some phone calls were made from the "in-flight" phones on the seats.
3. Phone calls were recorded and some received by loved ones.
4. Most of the flights were at lower altitudes.
5. The phone call that went through the United Airlines office involved several employees. They would all need to be part of a cover-story. Makes no sense.
6. If real passengers did not get killed on the planes, there is no reasonable explanation at to where they went.
Huge Conspiracy FAIL
Insanely complicated with way too many unnecessary risks of exposure.
My first journey man when I started apprenticing many years back had one main philosophy that I still use to this day.
The easiest way is the best way.
It wasn't done out of laziness, but because the easiest way typically involves making the least amount of mistakes.