Re: It isn't the False Positives that Matter, it's the Loss of the Presumption of Innocence
It's funny how the plods at the British Transport Police claim that they need all of this dystopian tech but when they're in a position to actually do some real police work they just can't be arsed.
Witness them failing to organise an identity parade for SIX MONTHS so that a murdering rapist was allowed to continue killing (see https://en.wikipedia.org/wiki/Simon_Levy_case) but hey it's no doubt more fun for them to pretend that they're the new mini-Stasi than get on with some actual police work.