From the article:
> Under the plans, 10 live facial recognition (LFR) vans will be used by seven forces across England to help identify "sex offenders or people wanted for the most serious crimes", according to Home Secretary Yvette Cooper.
I guess it depends on how dangerous these criminals are. If there was someone offing kids randomly in my neighborhood, I wouldn't necessarily be against this technology. I think it would be good in schools, where we really should know exactly anyone entering the school. But of course there is a limit.