but I'm sure there had to be some event where a car hit the audience. There were too many races for that not to happen.
Exactly. However you must look at it historically too. When an accident happens at a car race, what do they do afterwards? they make changes to the track, maybe to the grandstand, etc to try and prevent it from happening again and they are able to make it almost fool proof.
They cant do that with accidents involving aircraft because every flight and every race or demo is different. At some point whether its from the Reno accident or a future accident, they will change it so much that it will take away from the whole experience and almost make it pointless to do the event in the first place. For Reno that means having the grandstands further away from the track which will take away from the whole experience of seeing the races overhead. realistically i could see the grand stands having to be half mile away from the track their, but at that distance, who really would want to go? i don't think i would. Personally, i don't think any one of those families should be able to sue over their injuries or losses either, but that is a different discussion.