Who Deleted Me is an application that does something which is largely agreed Facebook itself should do: letting you know who has unfriended you. Yes, by granting this application access to your Facebook profile you will be allowing it to look through your contacts, and send you a notification when someone has deleted you.
When you think about it, it is a bit puzzling why Facebook fails to provide a service of this nature itself. I mean, the reasons why it refuses to let you know who has visited your profile are entirely understandable ? that would violate the privacy of the other person. But letting you know when someone has deleted you? That is a different story. It is information you can find out yourself by merely looking at your social graph.
So, will Facebook one day offer a service like Who Deleted Me to its users? I think that is a fair assumption. As more people join the site, the demand can but go up. But until that day arrives, we will have to rely on services such as this one.
Who.Deleted.Me In Their Own Words
Who deleted me on Facebook?
Why Who.Deleted.Me It Might Be A Killer
It does something Facebook itself should do (and will probably do one day).
Some Questions About Who.Deleted.Me
In which ways can you be notified when someone has deleted you? 
