If a driver was to over-cook his flicks, then technically no matter where you stand, inside, outside you have a good chance of being collected. Thus up a bank above roof level of the car is the only "safe" place...
Rallying does present this issue to spectators although you just need to be street smart about where you spectate from. Most of us here on the forums know where is safe and where isn't thus we have no issues. However time and time again im sure we see people standing in stupid places thinking they are totally safe....
We do put a lot of faith in our drivers to not cock it up however being human mistakes do happen from time to time.