Grey hats and blue skies, dealing with airline security

Since Sept. 11, 2001, the airline industry has been one of the fastest industries to upgrade their security procedures and protocols against various threats, both present and perceived.
Threats from possible terrorist bombs and improvised explosive devices have been curbed, and not one American plane has been hijacked since the tragic events of that fateful day.
However, hackers don't need to board an airplane to gain control of the systems set in place to control it.
Though cybersecurity breac