I doubt you would wear them 24/7, and you'd only want to wear them if you intentionally did not want to be recognized (at an airport/casino/robbery) but the fac

I doubt you would wear them 24/7, and you'd only want to wear them if you intentionally did not want to be recognized (at an airport/casino/robbery) but the fact that you had them on would draw attention to yourself, plus I suspect it'd be easy to trace back to the purchaser if the adoption rate were low.