Indeed. And considering the hundreds of millions[1] of people who pass through london’s stations each year, that would means hundreds of thousands of false posi

Indeed. And considering the hundreds of millions[1] of people who pass through london’s stations each year, that would means hundreds of thousands of false positives. [1] https://en.m.wikipedia.org/wiki/List_of_busiest_London_Underground_stations https://en.m.wikipedia.org/wiki/List_of_busiest_London_Under...