I'll admit that this video had me intrigued at first, although it gets a bit weaker as it goes on. However, I think a more complete quote of the privacy policy is in order :
Quote:
Originally Posted by Facebook
Facebook may use information in your profile without identifying you as an individual to third parties. We do this for purposes such as aggregating how many people in a network like a band or movie and personalizing advertisements and promotions so that we can provide you Facebook. We believe this benefits you. You can know more about the world around you and, where there are advertisements, they're more likely to be interesting to you. For example, if you put a favorite movie in your profile, we might serve you an advertisement highlighting a screening of a similar one in your town. But we don't tell the movie company who you are.
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Emphasis mine.
So, Facebook collects anonymous usage statistics. Well, christ, they have to pay the overhead somehow. I thought everybody knew by now that you never get something for nothing. A service that has no monetary cost is going to require some form of remuneration. Personally, I see nothing wrong with that.
Also, everything that has been said above. A small bit of knowledge goes a long way in ferreting out information online. The solution, of course, is to not post information online that you don't want to be publicly available.