What Facebook Quizzes Know About You - NYTimes.com advises facebook users that even if they themselves don't use a particular app, that the app. can access their personal information if a friend uses it.
Links for adjusting your privacy settings are included in the article. At the present time, the ACLU of Northern California is taking action to raise awareness of privacy issues surrounding Facebook applications, in particular quizzes.
Advice from a colleague: DELETE your FB apps NOW: At the top of the FB page, click on Settings, then Application Settings. At top right, it says Show: & a drop down menu. Select Authorized. This will bring up a list of all the APPS you have authorized to have access to y...our information. Use the X on the right side of each one you want to delete. If there is no X, that means it is a Facebook created app you cannot delete.