Never ever post anything so personal that identity thieves can steal your challenge questions:
Case in point : The Name Game on Facebook. This cute and mostly-harmless game can have serious repercussions of you have an open profile. It asks you to type your parent’s middle names, the street you grew up on, your pet’s names and favorite colors. All are answers to CHALLENGE questions I have seen on security websites.
Remember that Sarah Palin’s Yahoo Email account was cracked by using easy-to-find personal data which allowed some jerk to answer the password challenge questions. Some things are best kept to yourself.