I often wondered if anyone who was being faced with a court martial for breaking rules or limitations ever used a defence based on what was seen at flying displays.
I particularly remember seeing one large helicopter which had, among other things, some pretty onerous angle of bank limits on it being thrown around with great abandon. If my rapidly failing memory serves me, I recall counting about 5 gross violations of flight manual limits during the display. The display had been approved by the Air Officer Commanding the particular group which flew the machines.
The service which was doing the display was quite mortified to find several years later that their airframes were all cracking, mosly due to people putting on impromptu displays of their own, based on what they saw at the airshows.