Do you want to hear my idea for an invention?

Imagine a pair of WiFi transmiting USB connection units...sort of like two little walkie-talkies. You plug each into different computers within a certain range...maybe a few hundrew feet max. then you could have network-less comunications with anyone you please, and it would be totally covert...until of course someone creates a spyware program to detect this. Does it exist? Is it possible? If you patent this idea, please send royalties to - winonalake@hotmail.com