We do know this now certainly. Did we when the privacy policy said differently back when we first started using it? No, of course we didn't. There was a privacy policy.monkey jesus said:You have a misaligned view of what privacy is, its not withholding absolutely all information about yourself its about keeping private that which you wish to keep private. Facebook is lousy with people spewing their every inconsequential thought and deed onto it's pages, but they are inconsequential. The vast majority of users understand that anything you put on your profile is up for grabs and self-regulate accordingly.
When we set our privacy settings to maximum, is it unreasonable for us to expect that setting to stick? No, it isn't. Is it unreasonable for us to expect that what we've set as private, is private? No, it isn't.
Ultimately, this is what gets up people's noses about Facebook messing about: The constant changes of privacy policy, the dishonestly and the base greed of a company that is already making millions (billions?) every year, and is trying to make more by screwing over it's customers, and which then does it's level best to stop you from opting out.
Yes I know. As someone said earlier, 'we aren't the customers, we are the product'. Well fine. Just a pity no one realised or admitted that way back when it started integrating itself into our lives.