Spinout,
your argument can just as easily apply to those who dont turn on the radio, tune the correct frequency or dont know what to listen for or say at the appropriate times.
Stick Pusher, just because some organisations ban a procedure does not make it unsafe. My organisation bans us from accepting VFR, doesnt mean VFR is unsafe.
I have used IFR poickup, VFR on top in the US and it works fine; (was nice to have an Air to Air radar though) always had flight following though in radar coverage.