We are always warning about police abuse of personal data. Beyond the fundamental privacy violations arising from collecting and storing vast amounts of information about ordinary people, there's the risk that police or contractors will improperly use that data to hurt or blackmail people. 

Turns out Bill O'Reilly knows all about that. He allegedly asked police to spy on other police in order to gather information about his wife, whom he suspected of cheating on him with…wait for it…another cop. Ew.