I am (predictably!) shocked by the fact that some pilots appear to be using a system without knowing if it is working. First time you put the radar on because you think you need it......................? What's that word again, 'airmanship'? I would venture to suggest that the 'deadly threat' does not lie in the equipment?
Confucius say "Turn on equipment, check it working". That has stood the test of time for ages.
Mind you, on the plus side(?) I sat several times alongside some young hopefuls who had the radar on at 5 deg up ('SOP' shutdown setting), at least with the correct screen brilliance set, on a CAVOK cruise for HOURS until I asked if they could see any weather in space...........................
Lucky for all on board there was nothing on their screens.