Countries and criminals around the world are [ tracking people's movements through portable phones ]( http://www.commondreams.org/news/2014/08/25/wapo-governments-exploit-cell-phone-technology-track-users-worldwide ) . This is why I don't have one. The NSA [ can figure out that two people know each other ]( https://stallman.org/archives/2013-nov-feb.html#05_December_2013_(NSA_collects_5_billion_cell_phone_locations_per_day) ) by seeing that their cell phones are in close proximity.
Ссылка: https://stallman.org/archives/2014-may-aug.html#27_August_2014_%28Portable_phone_tracking%29