A very good and popular tools to search for friends and even long lost friends. Recent UI updates moves facebook back to track on focusing people interaction rather than a gaming site.
However, it is a giant Data Mining machine and use it with cautious, you personal data can be leaked to public eyes without proper setup. And for your information, facebook does use your information to help their advertisers to target on you.
This is Facebook for crying out loud... It a social network society that gives access only for those who are friends with each other, never heard of any adult content nor hateful, violent or illegal content in this website, and if there is, the terms and agreement are un-followed by the user.
-Users are unable to delete data once it is set on the servers.
-All pictures, video, information, etc. that you upload is immediately property of Facebook. You no longer own or have any rights to any of it.
-Allows people to post inappropriate pictures, and also allows users to post hateful comments.