Many moons ago when my workplace was on the north side at Farnborough it was pretty well under the display line for the airshow. So I had the joy of popping up onto the roof to watch the displays overhead during the practice week. After a typically spectacular display by a Russian fighter - the one that did the cobra maneouvre if I remember correctly - I wandered over to the pan where the aircraft were parked.
The said aircraft taxied to it's place, shut down and the canopy opened. The pilot climbed down the steps and he was wearing bone dome, T shirt, jeans and trainers! Clearly he didn't need any bars to prove anything to anybody!
Jim