How to Find Hidden Email (That Hidden By Privacy Setting) on Facebook

If someone annoying you or make a fake account, you can find his email even if hidden by privacy setting. By these simple trick, the secret revealed.
example: my target is http://facebook.com/posmetro.batam, this is the real fake account, made by someone who hates Posmetro (http://facebook.com/posmetro

Basic Action you need to
- make sure you have been a friend of target (posmetro.batam)
- have yahoo mail (or make new)

This is what you should do

1. Login to your facebook. Make sure you have been connected to target (surely as friend), see notification.