I highly recommend the movie The Lives of Others, about the Stasi (secret police in the former East German Republic), and books by Judge Andrew Napolitano, Constitutional Chaos: What Happens When the Government Breaks Its Own Laws, and Jules Boykoff, “Beyond Bullets: The Suppression of Dissent in the United States.” Each has much to teach us about the consequences when governments disregard civil liberties and evesdrop on citizens, if we are willing to listen.