It's all cool. It's not like privacy has anything to do with human rights or just plain old human dignity. I'll just start up a really nifty hat and sunglasses collection for every time I step outside.
Wire up your hat with infrared LEDs for even more fun.
Tried that. It's only the lowest, shittiest cameras these days that don't have an infrared filter on them. Buddy of mine is Ashton Kutcher's next door neighbor and we actually built some prototypes; that low-pass has been commonplace since the original iPhone.
IR illuminators will absolutely blow out IR cameras but IR cameras are generally getting used less and less for daytime capture for the simple reason that they can be blown out by IR illuminators. They sort of work with old-school security cams and don't work worth a shit against paparazzi. Expect that any video stream used for facial recognition is going to be paparazzi-grade, not 250 TV lines of 15 frames per minute.