I think what they are failing to address here, and what is incredibly misleading of them in this message, is that they fail to define what "public information"

I think what they are failing to address here, and what is incredibly misleading of them in this message, is that they fail to define what "public information" or "public activity" means to them. They define this in their TOS & Privacy Policy as pretty much anything you do on facebook, or a separate property that integrates with them, that you don't EXPLICITLY set as private. This statement tries to make it sound like they use very little data, when in all actuality most of what you do on FB is considered "public" to them even if they don't show this stuff publicly. That's not okay.