Straight from the Big Brother manual
How on earth did this get to be a patent?
On the other hand Facebook aren't trying to hide their intentions...
"In one embodiment, a method is described for tracking information about the activities of users of a social networking system while on another domain ... logging the actions taken on the third-party website in the social networking system ... correlating the logged actions with one or more advertisements."
"the actions taken by users can be correlated to the vast array of information attributes that the social network system maintains in order to improve analytical and targeting processes"
"...the user can be informed of online activities that the user's friends have taken outside the social network system ... Social ads thus allow advertisers to enjoy the credibility that consumers naturally give to their friends through word of mouth advertising"
"One benefit of mixing the newsfeed stories and the social ads in a single list presented to a user is that there may be little or no differentiation between advertising and general information that a user would want to know"
"The user's experience can be integrated between the third party website and the social network system such that the information is used in both domains"
"...If the user clicks on a particular friend, the social network system may communicate to the third party website a list of items that the friend has purchased"