*supercollider

Can’t figure out who half the people on your Facebook friend list are? Feeling sadistic and want to burn an ex in effigy? Or just really hungry and want a free Whopper?

Head to Burger King’s Whopper Sacrifice app and chuck 10 of your friends to the curb, and they’ll reward you with a free whopper.

Some people seem to be doubting this, but I can confirm this app is not a spoof, it does actually delete your friends (don’t worry, it goes out of its way to make this clear).

And this is the genius of the app.

After the initial spurt of friending that goes on in social networks, a lot of people pare back. And this app actually makes it easy and fun.

And it’s already got over 16,000 installs on its first day of official release, which is pretty amazing and likely testament to the strong contagious effect of the app’s usage.

Everyone of the people who gets deleted gets a notification that they’ve been deleted, with a link back to the app. Who wouldn’t want to see exactly how you’ve been sacrificed, and then try the power seat at that point?

It’s a very small, branded utility with a viral hook built in and a link back to product sales. As a simple tactical idea I think it’s a great idea and nice execution.

Update: Facebook have killed the app. Cue a fresh round of publicity and notoriety for both Burger King and CP+B. Brilliant.