For Arby's, yes. For Wendy's, you bet. For In-n-Out? Duh. But for Burger King? Hm. Not so sure. Depending on where you stand with the Whopper, Burger King's love-it-or-hate-it signifier, BK has just launched Whopper Sacrifice, a Facebook application that asked you to unfriend 10 of your Facebook friends in exchange for a free Whopper.

Laughing Squid has footage of Mike Monteiro of Mule Design Studio defriending a pal in order to land a (mustard-drenched!) Whopper. If you too want to cleanse your Facebook friends list for a meat patty, go here for more details.