I used this with some personal video surveillance to identify some thieves who were casing driveways to find cars to get into. Instead of wasting hours looking at footage, I was able to give the police excerpts that helped them identify the perp. Also, because of the circumstances and footage, they were able to charge him with a more serious crime than petit larceny, which means he won't be back next week.
It's an effective tool. If you're allowed to have a camera, you should be allowed to look at it with whatever means you want.
The reality is that the horse is out of the barn. The Federal government has been doing this type of surveillance either using facial or LPR data on interstate corridors since at least the 90s.