Le ping. That's ridiculous. The NSTB claims the best way to reduce CFIT accidents is controlled airspace .
and radar.
With proper training and procedures the ATC could have informed the pilot in the Benalla accident so the accident could have been prevented.
Blogs. I have never supported non radio aircraft mixing with airline aircraft. My AMATs changes introduced MBZs
However if you want a traffic information service on VFR that's a minimum of ICAO class D airspace.
I designed and built the first beep back units so pilots would at least know if they were transmitting a carrier wave. Better than calling in the blind because there is so much resistance to US style Unicoms.