Doesn't need to see your face.
You have a unique heartbeat - like a fingerprint. It's based on the size and shape of your heart + body. It doesn't change unless you have a major event like a heart attack.
To establish ID all they would need to see is a patch of skin for a few heartbeats.
Motion Magnification + Heart Rate Estimation
https://www.youtube.com/watch?v=U5MqepavcKM
https://www.wired.com/insights/2014/06/heartbeat-may-soon-password/
CA caught fire because of PG&E powering down their Smart Meters.
The Tubbs investigation is complicated, as it relies on a large amount of physical evidence, Campora said. With leads on the fire’s origins possibly pointing to more than one location, investigators examine smart meters, consult experts,and examine photographs “to figure out how the first fire got to where it was going,” Campora said.
https://www.bloomberg.com/news/articles/2018-11-12/edison-pg-e-are-targets-as-wildfires-press-lawyers-into-action
http://emfsafetynetwork.org/smart-meters/smart-meter-fires-and-explosions/
5:5 I'll gather up some other digs.