We live in a free country. Anyone can buy "toys" for the us $112,000 fine (jammers are also considered illegal in Britain, eu countries, Australia, Canada, India, Singapore, etc.),
Although this is possible, I have one of the popular civilian GPS jammer.
In 2012, GSM jammers were widely used in public places.In 2014, Russian developers used their equipment for use.In 2014, hacker magazine saw interference (jammer) as a useful gadget.In February 2015, an African intruder was dragged into parliament jam.
Interestingly, veseluka began to appear, with explosion-proof devices (and interference detectors) on the high power jammers, and in turn, anti-theft device jammers, and so on.