Don't block the sensor...You can't mess with THEIR equipment.
But your own sunglasses, well you can protect your eyes from I.R. beams...
The benefit is that "events" will not be triggered, so no recording of body triggered "events".
If the camera cant find your retinas, it can't find your face and body.
I have a pair, they work.
A fringe movement of privacy advocates are experimenting with clothes, makeup and accessories as a defense against some surveillance technologies. Some wearers desire to opt-out of “surveillance capitalism,” while others fear government invasion of privacy.
www.seattletimes.com
Anti Facial Recognition Reflective Eyewear & Sunglasses. Maintain your privacy from infrared surveillance cameras and 3D infrared facial mapping with this adversarial device.
www.reflectacles.com