Most of the comments on this article regard the privacy of the individual against the police or other state authorities, but a main point in the article is that

Most of the comments on this article regard the privacy of the individual against the police or other state authorities, but a main point in the article is that this license plate/vehicle fingerprinting data is public information subject to FOIA requests, and thus any citizen can use FOIA requests to track any other citizen. The article touches briefly on the implications of that for jealous lovers or people motivated to stalk others. That's a bit different from scrutinizing the operation of (potentially dangerous) vehicles on a public road. At some point US society really needs to have a debate about how FOIA and the surveillance state intersect.