How mobile phones let spies see our every move (Guardian) -- "The technology 'sees' the shapes made when radio waves emitted by mobile phone masts meet an obstruction. Signals bounced back by immobile objects, such as walls or trees, are filtered out by the receiver. This allows anything moving, such as cars or people, to be tracked." (Comments: This is not about tracking people using cell phones. It is about tracking any moving object using cell technology. Scary stuff, in my opinion. What do you think?)