Winstun, my point was that at 110 km/hr I usually know the other car's there, have time to see it coming and time to do something about avoiding hitting it - a luxury I don't enjoy at 400 odd kts TAS on climb or descent. This is now the primary means of seperation in Australian Class E airspace.
The jobs got enough "threats" without introducing new ones, like the "Minister for Transport and Regional Services, The Hon. John Anderson MP's", NAS.
Incidentally, on a per departure basis, the road is a far safer place to be in spite of the "unskilled, distracted, fatigued, tipsy, high or even neurotic". Tell you anything?
And without casting aspersions on our Recreational Pilots some of them, who are now responsible for avoiding a collison with 400 odd people, may fall into any of your first three categories. No offence intended.