Diatryma
I do not know the answers to the particular questions raised by Mr Murphie, but if what he says is correct they are indeed very pertinent.
The passenger has a right to know with whom exactly he is trusting his backside and immortal soul.
A Government by proxy determines the safeness or not of the individual operator, it is still the passengers right, and it is exercised every second of every day to decide whether he/she agrees with it.