Just don’t let ancient equipment fly at shows, that should solve the issue. And I do mean the plane, not the pilot.
Define ancient? Who decides? These planes get millions spent on them to modify them and inspect every square inch. In the world of motorsports when you are pushing thing hard, stuff breaks sometimes. The only true answer for 100% safety is to chain all airplanes to the ground and put little bits of foam on all the sharp edges.
I think you will find that many of these planes are maintained to some very exact specifications. Do just a little bit of homework.