When a friend of yours visits an application or authorizes it, the information that the application can access includes your friend’s friend list and information about the people on that list. Thus it can access some information about you. Please note that applications are obligated only to act upon the request of your friend and must respect all of your existing privacy settings.
For those of us who are on Fb and have friends (it’s supposed to be a social thing, right?) it seems that there is no way of getting around releasing info to applications unless you’re willing to be very selective about what information you release on your Fb profile. This ultimately means that pretty much every application will get its hands on your information unless you highly restrict:
- your number of friends (though you still can’t control what apps they may authorise without your knowledge)
- the info you release (though most of us probably don’t mind sharing my info with people we’re friends with, which doesn’t equal their applications)
- … or you just get off Facebook!