As face recognition in public places becomes more commonplace, Big Brother Watch is especially concerned with false identification. In May, South Wales Police revealed that its face-recognition software had erroneously flagged thousands of attendees of a soccer game as a match for criminals; 92 percent of the matches were wrong. In a statement to the BBC, Matt Jukes, the chief constable in South Wales, said “we need to use technology when we’ve got tens of thousands of people in those crowds to protect everybody, and we are getting some great results from that.”

If someone is misidentified as a criminal or flagged, police may engage and ask for further identification. Big Brother Watch argues that this amounts to “hidden identity checks” that require people to “prove their identity and thus their innocence.” 110 people were stopped at the event after being flagged, leading to 15 arrests.

Simply walking through a crowd could lead to an identity check, but it doesn’t end there. South Wales reported more than 2,400 “matches” between May 2017 and March 2018, but ultimately made only 15 connecting arrests. The thousands of photos taken, however, are still stored in the system, with the overwhelming majority of people having no idea they even had their photo taken.

Source: UK Watchdog Calls for Face Recognition Ban Over 90 Percent False-Positive Rate