Ahem... Google tracks you all across the internet even if you have never used their services... never heard of google-analytics have you ?  Google Analytics? What, you mean that tool that lets you analyze how customers are using your website in order to improve it? THAT thing? Oh yeah, that's evil. That's the thing that's functionally equivalent to observing patrons in your store? THAT Thing?  No.. it's the part of google that is integrated into almost every frikki'n webpage on the net so it can track your every move...(google-analytics.com)Every website you ever visited...every page you looked at everything you clicked on etc...  All this information is gathered and stored by google to build an 'anonymous' profile of you...  