I found out about this quiz from American Civil Liberties Union (ACLU) on This Week in Tech (TWiT) and thought sharing this information is important. This quiz (yep, its a quiz to demonstrate how harmful they can be) tells you the data accessible to third party applications when you give these small quizzes. Worst part about this is, you do not just give your information but also provide information about all your friends. Even all the private information like political view, birth year, preferences, current location about your friends is accessible to these third party applications. To prove the point ACLU displays some information as you can see on the screenshot below.
![8696943_b29837838d[1]](http://static.zooomr.com/images/8696943_1672cdca3b_o.jpg "8696943_b29837838d[1]")
As you notice private information about my friends is accessible to them and these third parties can be anyone, not have to be a reputable organization. That’s why These quizzes should be avoided. Even Facebook does not have control (as of now) on how this information can be used/misused.
Update: here is an article on how to secure some of your data after recent FB policy changes.
Update:
Facebook has added the privacy settings option so one can select what his/her friends can share about him/her. This setting can be found under ‘Privacy settings > Applications and Website > What your friends can share about you‘
