
Once upon a midnight dreary, while pondering work for a meeting the next day, you decide you've had enough of your desk. Henceforth, you declare, you'll work anywhere in your house your heart desires: the sofa, the bedroom, the backyard, the kitchen, the bathroom (well, maybe not the bathroom). So you buy a wireless laptop, install a wireless router, and after you check that it all works, give yourself a pat on the back.



It would send chills down your spine to learn how easy it is for others to connect to your Wi-Fi network and put your computers under their spell. If your computer has be...