Those seemingly fun-spirited questions and quizzes on Facebook are not only collecting profile information, but some are harvesting answers to secret questions used when you forget your password. 

We map knowledge-based authentication (KBA) attributes in our identity threat intelligence API and see KBA exposed in underground communities now and again. Criminals can use this information to piece together a pretty thorough identity and authentication profile on unsuspecting people.  

A general rule is to avoid putting any of your personal information out there, even if it seems harmless. You may also want to consider help protecting your digital identity and assets from an IDTheft company.