Facebook Search For Friends
For those who have no idea about the reverse email lookup-- I'll bet there will be couple of- It's an email-based search functionality that lets users to search for other Facebook user based upon their email address.
Using this function is dead simple. Simply paste the e-mail address of the a stranger or unknown email sender into the Facebook search box and an auto-suggest drop down will let you know if a coordinating profile exists in the social network.
Upside.
A major advantage of this function is that it provides a technique for confirming unidentified e-mail addresses and assist you to find an individual in seconds.
Drawback.
A major oversight of this feature is that spammers can quickly map gathered e-mail accounts to user profiles, and use the openly readily available information to craft very convincing tailored e-mails (for phishing). Facebook Search For Friends So, if you are on Facebook, avoid sharing your email address with strangers on forums and chatroom.