Whoever is surprised by Facebook's privacy policies needs to do a reality check. Facebook does not exist to make you happy or to allow you to reach out to potential customers. It is a business, and you are nothing more than a pawn for them to accomplish their goals. They're a publicly traded company for crying out loud. Their commitments rank like this: 1. Stockholder. 2. Themselves. 3. Employees. 4. Sponsors and creditors. 5. The environment they exist in.... etc etc ad nauseum. Last on the list: you.
Make no mistake about it, they are there to make money off of your membership.
Sure there are some benefits. For me it's about keeping in touch with friends that are so far away I cannot visit them in person, or reaching many people with a similar interest. That is a benefit to me.
It's up to each and every one of us to figure out whether it's worth it or not.