"Aviation in itself is not inherently dangerous. But to an even greater degree than the sea, it is unforgiving of any carelessness, incapacity of neglect"
Including carelessness in crowd placement at airshows.
What is 500 or 1000 or even 2000
feet to an out of control aircraft doing 500 knots? 500 Knots per hour equals 843.905 Feet per second. How big does the "buffer" need to be again?
People want to be "up close to the action". Accidents
do happen. The solo in Frecce Tricolore at Ramstein hit two other aircraft on his pass and the solo's wreckage went into the crowd.
There are risks awaiting us everyday, around every corner, on every street, on every highway.
You want the crowd to be safe? Put them a mile or two from show center. Oh... wait... no one will come.