Magplug, yes I agree stick to the facts. Those killed were not only "spectators gathering in unauthorised areas outside the field" - there were people going about their own business. It is this fact which probably opens the biggest can-of-worms.
Personally, I'm not minded for an individual public flogging as there is enough evidence to say that display pilots crash on a fairly regular basis - it happens. It will be more interesting to understand the various slices of Swiss cheese contributing to this tragedy and whether any individual hole, or combination of, could have been reasonably foreseen.