Head runnion of the NRA W. LaPierre is apparently calling for a database of the mentally ill as a means of thwarting would be mass-murderers. The idea I suppose is to exclude the mentally ill from owning firearms.
OK, I'll play. Ten per cent of Americans are on anti-depressants. Others have various other issues which could be considered mental illness. PTSD, anxiety disorders, autism, addictions, and so on.
I'm not sure LaPierre has thought this one through.