Little Peepers Everywhere

Wiretaps, which have increased almost tenfold since data was first reported in 1969, are only the tip of the surveillance iceberg. In 2011 federal and state courts approved a total of 2,732 wiretaps; but government agencies made over 1.3m requests for data to mobile-phone companies. That figure includes wiretaps and pen/traps, but it also includes requests for stored text messages, device locations and tower dumps, which reveal the presence of everyone—suspects and not—within range of a particular mobile-phone tower at a particular time. Most of these requests require no warrants at all.

Government surveillance: Little peepers everywhere | The Economist

IN FEBRUARY 1928 the Supreme Court heard the case of Roy Olmstead, whose conviction on bootlegging charges relied on evidence obtained by tapping his phones....