> Building a large list of potential suspects and/or getting some direction for further study based on a face match sounds very useful Useful and sensible can

> Building a large list of potential suspects and/or getting some direction for further study based on a face match sounds very useful Useful and sensible can be two very different things. Total surveillance, down to every private space, could be useful to prevent crimes and save lives in accidents, that still doesn't make it sensible.