Private companies engaging in large-scale surveillance are […] filing lawsuits alleging their First Amendment right to photograph license plates is being infringed on by state laws forbidding the use of automatic license plate readers by private companies.
[…] Vigilant [a private company] has filed another lawsuit, this time against the state of Arkansas, arguing that a state law curbing the use of LPRs [licence plate readers] by private companies tampers with its free speech rights. […]
https://www.techdirt.com/articles/20140613/09224127569/license-plate-reader-company-sues-another-state-violating-its-first-amendment-right-to-build-18-billion-image-database.shtml