@mods, actual title is "Unchecked use of computer vision by police carries high risks of discrimination" which is the big issue here.
There are at least two issues, and both are worth discussing. Interestingly, if we prevent the surveillance problem we also prevent the racist surveillance problem, so in this way one could argue that (in this specific situation) the surveillance problem is more fundamental.
This comment will be downvoted, but this is hyperbole. Your everyday movements are more than just your activity in public spaces.
Likewise any website publishing your activity in public spaces is not entitled to linking it to your PII, because if they do deanonymize it, you now have means to take it down.