Ψάχνοντας στους όρους χρήσης του facebook βρήκα τα παρακάτω ενδιαφέροντα : By using Facebook, you are consenting to have your personal data transferred to and processed in the United States http://www.facebook.com/policy.php We may use information about you that we collect from other sources, including but not limited to newspapers and Internet sources such as blogs, instant messaging services, Facebook Platform developers and other users of Facebook, to supplement your profile. Where such information is used, we generally allow you to specify in your privacy settings that you do not want this to be done or to take other actions that limit the connection of this information to your profile (e.g., removing photo tag links). (Σημ. Aragorn : Αυτό το κάνετε;) http://www.facebook.com/policy.php Advertisements that appear on Facebook are sometimes delivered (or "served") directly to users by third party advertisers. They automatically receive your IP address when this happens. These third party advertisers may also download cookies to your computer, or use other technologies such as JavaScript and "web beacons" (also known as "1x1 gifs") to measure the effectiveness of their ads and to personalize advertising content. Doing this allows the advertising network to recognize your computer each time they send you an advertisement in order to measure the effectiveness of their ads and to personalize advertising content. In this way, they may compile information about where individuals using your computer or browser saw their advertisements and determine which advertisements are clicked. Facebook does not have access to or control of the cookies that may be placed by the third party advertisers. Third party advertisers have no access to your contact information stored on Facebook unless you choose to share it with them. This privacy policy covers the use of cookies by Facebook and does not cover the use of cookies or other tracking technologies by any of its advertisers. http://www.facebook.com/policy.php