Yea but's it's not going to help much. (Score 0, Flamebait)

[sarcasm] I mean seriously think about it. You have to mount those cameras above a persons head in order to get a good view right? Great, now all you can recognize is that just about every Chinese person has black hair. Holy shit Watson! Brilliant!
You can perhaps root out the dissidents who are bleaching their hair (those evil non-conformists!) but that's all this tech is gonna getcha [/sarcasm]

Petyr