The blame game being played by certain contributors over the last few pages is predictable but a little sad to read.
Over the last 20+ years display aircraft have been moved further and further away from the display line and more restrictions have been placed upon dynamic manoeuvres towards the crowd. There is always room for improvement, modernisation and organisation on the airfield, but if high performance aircraft are to be displayed then complete safety off the airfield can never be guaranteed.
In this horrible situation at Shoreham, the people killed innocently driving past were incredibly unlucky but the group of people standing next to the Police sign saying "No Stopping Here" were very foolish. Inside the airfield perimeter they would have been on or very close to the display line, which obviously would not have been permitted. Unfortunately therefore they must accept some blame towards their own demise.
Although this sounds incredibly callous I believe the insurance companies involved will take this into account in their deliberations.
100% safety on but especially off the display area can unfortunately never be achieved.