I am also not so worried about it being used as evidence in a court conviction, but what if it is just used to continuously monitor public spaces? In that case

I am also not so worried about it being used as evidence in a court conviction, but what if it is just used to continuously monitor public spaces? In that case the amount of data can filter out the noise, especially if you monitor a large area and can correlate samples over time. We should not necessarily worry about this being used as concrete evidence in court, but about it being an automated way of generating suspicion. I could totally see how such technology could be used to identify people who the police could focus on. On the other hand, CCTV is probably just as efficient for that, so perhaps this technology won't make it worse.