The most important line in my opinion is this:
But once you look at what people are sitting at these companies in supervisory boards and how many former NSA employees are employed there, even in higher positionsI didn't know NSA employees work at Facebook, Google, Apple or Microsoft but it would make alot of sense, after all, intelligence agents used to (and perhaps still do) work at major news outlets (MI6 and the British Media), so why wouldn't they go where the largest troves of personal data are kept?
If you are concerned about your privacy then always work under the assumption that anything you post on the Internet can be spied upon. In fact even if you don't post something but it's on your computer as a file or keystroke it can be spied upon if you have an Internet connection, whether by a hacker or a government.
One person told me that your personal data may be a currency of the future.
But perhaps data mining can also be put to a good use, right now it seems like it can only be used maliciously but I think a Facebook profile has the potential to be used for positive data mining.