> They also require you to know something easily researched from facebook (elementary school, mother's maiden name, etc.)
I'll never understand why someone would provide this information to Facebook. My friends already know the details of my life relevant to our relationship.
maybe because they're part of a "$foo High School class of '99" group/page/whatever with some friends, or perhaps both parents and grandparents are linked as friends, making it pretty easy to figure out mother's pre-marriage surname?
It's not just the explicit facts you provide, a significant part of the deeper value is from the linkages between them.
I'll never understand why someone would provide this information to Facebook. My friends already know the details of my life relevant to our relationship.