Remember the movie with Tom Cruise called "The Minority Report?"  Computers could predict your actions and police could arrest you based on a crime that you were PREDICTED to commit based on the software.  Science fiction at its best.  Well, it's no longer science fiction.   Raytheon Corporation has developed what they are calling "security software" that can mine data from social networking sites such as Facebook and Twitter and predict your actions.  This is scary stuff.  Read about it here.