The problem with relying on identification technologies or some type of biometric technology is that you have to have a database that can compare the captured real time data. There is no all-encompassing database where cell phone usage can identify a person or facial recognition can identify a person. It’s difficult to identify a person after the incident.

Removing the mask would act as a deterrence. Why do people rob banks with masks on, because they don’t want to be identified. People who go to protests and act illegally would be deterred from doing so if they couldn’t wear masks. Most people are uncomfortable greeting a mask wearing stranger at their house. That’s because there is a certain connotation about people’s motives when they are wearing masks.

Privacy advocates worry banning masks at protests will encourage harassment, while cops’ high-tech tools render the rules unnecessary.
— Read on www.themarshallproject.org/2024/11/12/mask-bans-protest-surveillance