WhoDeletedMe is an app and a Chrome browser extension that can keep an eye on your Facebook friends list and let you know who has been added or who has unfriended you.
According to Buzzfeed:
WhoDeletedMe only starts tallying your friend totals once you’ve downloaded it, so you can’t get a read on past friendships lost — only the platonic breakups that happened after signing up. And as an extra stalking bonus, you can also see the last time your friends logged on to the social network.
Oh, and there is something similar for Twitter.
What do you think — good idea or something that will lead to millions of people with inferiority complexes?