Last year at Thotcon the presenters were given what were purported to be faraday shielded backpacks - backpacks manufactured with fabric woven out of very fine conductive wires that are said to reflect radio frequency signals inside and outside.  The idea is that if you have a cellphone and you put it inside the bag, you could be sure that the phone was not talking to any cell towers so it would be harder to track the person carrying the phone, as well as preventing any malware that may have been installed from phoning home.  So the reasoning goes, even if …