Hopefully this backfires and just results in less people using Facebook on their phones. I refuse to use, or even allow, it on my phone, both due to privacy concerns and battery drain. I doubt Facebook would ban users that continue to use these apps, since that would cost them and they would seem to have little to gain from it, but then I wouldn't put anything past them at this point. I wonder if they'll still be available on third-party app stores.