People are snapping up devices to silence annoying chatterers. So what if they're illegal?
                                
                                
                                    (Newser) -
                                    Ever find yourself cut off mid-conversation, on a bus or train, by a lost signal? Could be the work of the guy sitting next to you, the New York Times reports. An increasing number of people are snapping up pocket-sized jammers, which emit signals strong enough to knock out cell...