The Electronic Frontier Foundation has published a series of documents detailing a secret FBI spyware operation that targets security vulnerabilities in users computers and installs spyware from social networking sites such as MySpace and Facebook.
Once infected the spyware allows the Feds to track the online activities of infected users as well as identify the user's location software installed on the computer as well as the hardware the user is using.
To make matters worse the FBI is pushing to require websites and applications such as Gmail, Skype and Facebook give the Feds to install this type of spyware at their demand to give the Feds the ability to spy on our personal data and online communications. If we choose to remain silent about this our expectation of privacy and other constitutional rights will disappear before our very eyes.