They try to make themselves out as the good guys that are fighting for the rights and privacy of their users:

  "We ensure that applications that access Facebook user
  data adhere to Facebook Platform policies," Facebook's
  representative Malorie Lucich said in an e-mail to
  CNET. 

But really they are only being petty over small issues:

  Diskin finally got a call late Tuesday saying he is
  infringing on Facebook's rights because he uses the
  word "Facebook" in his app name to let people know
  what it does.