Because they use wireless interfaces. Because some people find surreptitious conspiratorial killing beneficial, be it involving large amounts of currency or me

Because they use wireless interfaces. Because some people find surreptitious conspiratorial killing beneficial, be it involving large amounts of currency or mere amusement. Because an "accidental" bump from a stranger, with suitable planning & equipment, can have "unrelated" terminal results seconds or days later. Because that planning becomes a whole lot easier for someone who has the source code.