Don Tuite wrote:

Joe Sixpack, the promoters, or the flyers' egos? Dudley?

Don

It's an extremely complicated answer Don. A good friend of mine, Gen Des
Barker of the South African Air Force and ex member of the Silver
Falcons Jet Demonstration Team has written an entire book on just this
subject. I was pleased to have my own input included in this work. The
book is perhaps the most extensive volume ever written on airshow safety
and demonstration flying.
If interested, the book is "Zero Error Margin". I can dig you up a link
if you want a copy.
Other than that, the ultimate answer to this issue is that everybody
gets a piece of the responsibility. I don't believe the blame can be
laid on any one factor, as all factors are in play on any given day at
any air show.
Dudley Henriques