I too agree with Stik.
Not that I think that see and avoid is infallible, however good a pilot you are, however much you keep your eyes outside the cockpit. You can still miss aircraft - above you in a high wing aircraft, below you in a low wing one, behind you in a helicopter....which no-one seems to be able to see so we rotary pilots know that we've got to do the avoiding. But whatever you do, flying will never be 100% safe. Fly at altitudes other than 2000, 2500 etc, as someone mentioned (I think it was on the other thread)? Well, I've tried doing that, and found myself contstantly getting asked by ATC to fly at something they were used to!!!! And if we all fly at 1800 or 2200, aren't we back to square one? So let's just accept that it's potentially dangerous in the sky, though probably no more so than anywhere else, and let's all be careful out there.