I guess I am used to think from technical point of view. Think the upside this way: say a system can track either a Chinese spy or Capitol Hill mob and get him

I guess I am used to think from technical point of view. Think the upside this way: say a system can track either a Chinese spy or Capitol Hill mob and get him arrested in 30 seconds. joke aside, yes, I think the downside is massive (any kind of facial recognition). I believe this is inline with the development of transportation technologies. We would never need things like this when people are not moving so fast. We have had the ability to track people in the past.