Dark but succesful online campaign by Burger King

Burger King give a special offer for all Facebook users: if you delete 10 of your Facebook friends using the “Whopper Sacrifice” application, you get a coupon for a free Whopper — and your ex-friends get notifications letting them know what you’ve done an

 The funny program goes against social
networking, but Facebook users love it. According to Whopper
Sacrifice site till now more than 50,000 contact were changed to free
Whoppers.

Most branded Facebook applications
fail because they don’t do anything entertaining. But people waste
unfathomable amounts of time on Facebook teasing each other, sending
each other goofy virtual gifts, and otherwise trying to be amusing or
annoying.