tl;dr: Canadian software engineer Anthony Sistilli built his own ALPR camera to track police vehicles in Brampton, Ontario, documenting the project on TikTok as "a personal Flock surveillance camera to Flock the Flockers." Peel Regional Police officers subsequently showed up at his door asking about his "intentions," with one officer ironically expressing concern about how such surveillance data could expose officers' home addresses and schedules to bad actors—the exact concerns privacy advocates raise about police use of Flock cameras on citizens.