Sunfish - please don't bring up road behaiour - standards have diminished faster than most would have believed. Rule breaking is the norm on Australian roads today for one reason - reduced enforcement and puny penalties. The consequence is that even getting basics like indicating, speeding, redlight running, crossing solid lines, roundabout rules, even parking on the wrong side of the road is just beyuond the competence of most. Most pilots drive!!!!! Can you see the synergy?
Statistic - I love the people who speak of statistics and cost benefit. Just wait till someone close to you dies or you look at the financial penalty of neglect. To focus on the numbers and not consider the intangibles is a fools-errand. You will never see the big one coming and you will have very little chance of doing anything about it. A few rules and practices may make that big difference - if applied, if complied with. The "free-for-all" concept has not worked - give it up, smart people don't want it.
The VCA problem is not only GA anyway. Lets not forget the MIL and RPT's. For whatever reason at the time - a VCA is a VCA that puts those on board, and others at immediate danger from live airborne ordnance and other airspace users (AVM). TCAS won't protect you from stuff it cannot see. Rant over also. Good subject C CHANGE. I hope it gets through to the few who need the wake up call.