"he non-profit civil liberties' group the Electronic Frontier
Foundation (EFF) doesn't know, but it's filed suit to find out the
scope of the government's investigations.
"The lawsuit, filed at the Northern District of California's San
Francisco division court, seeks information from a number of
federal agencies under the Freedom of Information Act (FOIA) who
are listed as defendants in the case.
"The EFF is asking for records from the Departments of Defense,
Homeland Security, Justice, Treasury, the CIA, and the Office of
the Director of National Intelligence concerning their use of
social networking Web sites as investigative, surveillance and data