https://www.nytimes.com/interactive/2010/05/12/business/facebook-privacy.html
Facebook
has changed its Privacy Policy once again - and should at some point
consider calling it a Non-Privacy Policy.
If you are concerned
about privacy and you are a Facebook user, you have your work cut out
for you. The most time consuming part of protecting your information is
the blocking of third party applications. (This requires individually
blocking the applications like Farmville, Mafia Wars - etc.) Even if
you don't use the apps, your information is shared through your friends
who do. Blocking the apps is supposed to close this lane of Facebooks
information sharing highway.
Also, if you use facebook on an
encrypted wireless network, there is an application for Firefox and
Mozilla that will require facebook to connect using HTTPS rather than
HTTP. Caveat - chat will not work.
If you are a privacy nut -
check it out.