As part of its new Angry Whopper marketing campaign (which also lets you send Angry-Grams), Burger King has introduced the mean-spirited Whopper Sacrifice: they’ll give you a coupon for a free Whopper if you install their Whopper Sacrifice application on your Facebook page and then delete ten friends from your account. It apparently notifies the people you delete (which Facebook doesn’t normally do), but if you’re not feeling like alienating any friends you can try following these instructions for hacking the system. One Whopper per Facebook account and open only to residents of the United States.