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.
external applications that you can add to your profile take information from you without giving full details of what is being taken. your details are then sold on
-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.
facebook has been notified of inline frames Denial of Service exploit with applications that it continues to allow. Their response is that they will fix it when it becomes a problem, not before.