Start up idea:

Ordinary glass (as in spectacles) frames that have a near IR LED on the bridge and on the side. PWM to be efficient, bright, but erratic clock of around 10Hz.

Want a picture of me? Ask, or use film.

Surely there’s gotta be some narrow frequency band that disrupts it from working, right? I’m getting really tired of all the cameras and ALPRs around us.

I expect cameras will start to come with built-in IR filters in that case.

This. Projects like this already exist to blind surveillance cameras.