This is to help people who are data mining to try and get people's WoW accounts. Usually you're use some website like facbook/LJ/Guild Forum/Myspace.
Frequently i'll find myself with all the information I need to get into someone's account, except their email's secret question answer. So I tried thinking of ways to get people to tell me the answer for them.
Most of the time their secret question will be "what is my favorite X". This usually isn't very sensitive, and most people forget that's even their secret question. It's easy to trick them into telling you, just send them a quick email.
You pretend like you're a middle schooler (or elementary schooler if you think it'll work) and you're doing a science fair project trying to figure out what the most popular favorite things are. It would help a TON if they could fill out a quick list of their favorite things for you and send it back.
Example mail
Their secret question was : What's my favorite movie?
Subject : Popular Favorites survey (Not spam! Please read!)
Hey, thanks for taking the time to look at this. I'm currently an 8th grader in Jr High and am doing a science fair project. The goal of my project is to discover the things the most people like. The most "popular favorites". If you could fill out this short list of your favorite things for me, it would help out a ton.
Favorite Car :
Favorite Game :
Favorite Food :
Favorite Drink :
Favorite TV Show :
Favorite Movie : (!)
Favorite Book :
Favorite Song :
Favorite Song Artist :
Make sure you mix the secret question in there around the middle, and make sure it's in a logical place in the ordering.
This has a very high success rate, as it seems benign and nine times out of 10 people will respond to it.