Flock Safety’s network of automatic license plate readers (ALPRs) is creating a vast, interconnected surveillance database used by over 5,000 U.S. law enforcement agencies, scanning over 20 billion plates monthly. This rapid expansion has sparked a cross-partisan backlash in communities nationwide, from Arizona to New York. Activists, ranging from conservative constitutionalists to progressive privacy advocates, are protesting the use of their tax dollars to fund a system they see as a form of mass surveillance without consent. They raise alarms about data sharing with federal agencies like ICE and potential misuse, such as tracking individuals suspected of having abortions. While some cities have successfully canceled their contracts with Flock following local pressure, the company’s reach continues to grow, augmented by data from private businesses and Ring doorbell cameras, posing significant questions about the future of privacy and due process in America.