Facebook Friends Search
For those who do not know about the reverse e-mail lookup-- I'll bet there will be couple of- It's an email-based search functionality that lets users to browse for other Facebook user based on their email address.
Using this feature is dead simple. Just paste the e-mail address of the a complete stranger or unidentified email sender into the Facebook search box and an auto-suggest fall will let you know if a coordinating profile exists in the social media.
Upside.
A significant advantage of this feature is that it provides a method for confirming unidentified e-mail addresses and help you to discover an individual in seconds.
Drawback.
A significant mistake of this function is that spammers can quickly map collected email accounts to user profiles, and utilize the openly available details to craft very convincing individualized emails (for phishing). Facebook Friends Search So, if you are on Facebook, prevent sharing your e-mail address with complete strangers on online forums and chatroom.