Irony? When you sign up to FB you are voluntarily giving FB your data to use. You may not know what they want to do with that data, but it's no surprise they have the data and no great surprise - even if a disappointment - when they do use it.
FB wants your data and that's the point of their business model. Hardly the same as a government forcing them to provide your data, and trying to force them not to tell anyone this is happening.
And FB is serious about security - they don't want anyone else accessing your data because THEY want it to themselves :)