Ok, so my search results include : 1) fraudulent advertising from amazon and ebay trying to sell phone bags as 'jammers'. . Though I also got a result from amazon in india apparently selling an authentic jammer. (side note: so the amazon cancer already spread to india). 2) a couple of sites allegedly selling jammers but whether the sites are run by the government or not seems hard to tell... 3) make article https://makezine.com/2008/06/30/intentional-gps-jamming/ linking to this broken link... http://blog.makezine.com/archive/2006/12/wave_bubble_ope.html but this seems to be the original source http://www.ladyada.net/make/wavebubble/ (project seems a bit too complex) I also found this http://cdn.preterhuman.net/texts/government_information/intelligence_and_esp... (originally from phrack it seems) ...and some other stuff. All of it it seems rather old, though the information is obviously still valid. So there's more stuff than I originally thought though of course all the new articles are about the horribly catasthropic dangers of jamming.