Unsurprisingly, the ACLU doesn't want this kind of stuff collected and if it is collected, it doesn't want it associated with personal information and regardless, it wants it all flushed in a timely fashion.
Here's the other side, maker of license plate read products and their natural consumers, people who feel a need for security cameras and the police they call when there is a problem:
Me, I used to be Poor and read a lot of old paperbacks that I bought for Cheap at used bookstores. For a while (hey, I was quite young at the time), I went on a Perry Mason binge (yes, that series and those movies started with books). And I always thought it was a hoot that the hot PI guy could just sort of look through the window of a car and get the name and address of the owner off the posted registration.
We change our rules over time.