Tired of all those Facebook apps that want you to invite 6 friends blah, blah, blah.  Well what about a Facebook application that encourages you to ditch your friends for material gain? I wrote an earlier post about social currency on-line and this just turned it all on its head - in a very funny way.  Burger King’s Facebook application gives away a free Whopper for every 10 friends you ditch.  Check it out at Whopper Sacrifice. Disturbingly funny - hungry anyone?