I agree that the technicalities are both simple and complex but I can see how the pax might react ... Let's suppose that the CC are told that they do not have to check for luggage in the wrong place, laptops running etc and can just look at the readout of the seat belts.
"I'm not going to fly with Awful Airways again - the waiters [
] don't even come and check that everything is OK before we depart."
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"I tell you, we are here on Earth to fart around, and don't let anybody tell you any different." Kurt Vonnegut, Jr.