So more like Bond ABZ?
Jim - what makes you think other operators have not been doing the same?
The process works well until the pilot is confronted by a passenger(s) with less common sense and social skills than those demonstrated by Offshore Addict above (I'm choosing my words very carefully here!). End result is a pilot who is now potentially shook up or angry having been confronted by his passengers, then having to climb into a cockpit and focus on his real task of completing the flight safely. He will not be in the right frame of mind no matter how calm he appears.
The above is not supposition on my part