I think it is naive to assume they can 'catch' these cases. BTLE radio ranging, which can be manipulated by numerous factors outside the phone, and actual infec

I think it is naive to assume they can 'catch' these cases. BTLE radio ranging, which can be manipulated by numerous factors outside the phone, and actual infection risks can easily be decoupled (and correlation is even strenuous at best). So just acting as one of the 20% of people that are completely callous and oblivious to the consequences of their actions, just wearing proper PPE, would be sufficient cover. Besides, the public is led to believe that no location identification (direct or derived) is possible, so on the basis of that 'sitting outside the hospital all day' should not be identifiable, right? As for taking out a directed 'hit', that will certainly not show.