Anyone want to make a mobile app that emits 'noisy' light so when you use your phone in public CCTV facial recognition fails?* I'd be interested to know if thi

Anyone want to make a mobile app that emits 'noisy' light so when you use your phone in public CCTV facial recognition fails?* I'd be interested to know if this is a viable concealment strategy. It might only be effective at night or low light situations, so sunlight doesn't wash out the noise. It would be pretty subtle to use as well, how many people do you see walking around with their noses stuck to a screen? * For research purposes only, of course.