It is sad, and my condolences to the families. But you can't really blame race officials for this. Every year they post more and more warnings to people to stay back from the track (for incredibly obvious reasons) and every year there are more and more people crowding it. When officials go by asking them to step back, as soon as they're gone the crowd steps right up to it again.
The same thing is happening with the Baja races, except there you have locals going out to the course the night before to dig pits and jumps. Depending on your perspective they're either trying to get the drivers injured or just trying to make it more exciting as they watch the next day. I'm afraid that as these races start drawing bigger crowds they may go the way of the "real" rally races.
Big cities suck
"Not putting miles on your Ferrari is like not having sex with your girlfriend so she'll be more desirable to her next boyfriend." -Napolis