Concealing Location With Snack Bag Faraday Cage

"Employee used crisp packet as 'Faraday cage' to hide his whereabouts during work":

Tom Colella, a 60-year-old  electrician in Perth, lost his job after an anonymous letter to his firm claimed that he left work to play golf at least 140 times over the last two years.

Australia’s Fair Work Commission, a workplace tribunal, heard that Mr Colella blocked his whereabouts by storing his personal digital assistant, a phone-like device that has a GPS inside, in an empty foil packet of Twisties, a puffy cheese-based snack that is popular in Australia. 

The tribunal found that the packet was deliberately used to operate  as an elaborate “Faraday cage” - an enclosure which can block electromagnetic fields - and prevented his employer knowing his location. The cage set-up was named after English scientist Michael Faraday, who in 1836 observed that a continuous covering of conductive material could be used to block electromagnetic fields.