I don't think the article mentions it, but in addition to the tips in the article, stay away from wireless or bluetooth connections, remove the card(s) if possible... While it might seem tin foil hat, any over-the-air communication is fairly trackable (not saying wired isn't). And while your computer or device tries to connect to a network, The control packets sent out to channel 0 will even send a list of preferred networks you've connected to in the past...