I wonder what the tower and airport authorities would have done if the pilot declared a formal emergency that was a threat to the passengers? Say someone could not stand it anymore and was smoking in the lavatory, and threw a lit cigarette but in the towel bin, causing a smokey fire?
I'm no pilot.
With that said, in that sort of emergency, the passengers would have been evacuated immediately via the inflatable slides.
I assume the airport would have found a way to get the passengers out and to safety.
The declared emergency would have stopped other operations and the firefighters would have responded.
Now, why couldn't they simply declare the same emergency and get everyone out? I fear the that "the rules" simply prohibited it.
I'm no lawyer, either.
With that said, that would have been a false distress signal, a federal felony.