Most Facebook users don't realize this is happening. Even if they know what the company is up to, they still have no idea what they're paying for Facebook because people don't really know what their personal data is worth.

　　The biggest problem is that the company keeps changing the rules. Early on, you could keep

　　everything private. That was the great thing about Facebook—you could create your own little

　　private network. Last year, the company changed its privacy rules so that many things—your

　　city, your photo, your friends' names—were set to be shared with everyone on the Internet.

　　According to Facebook's vicepresident Elliot Schrage, the company is simply making changes to

　　improve its service, and if people don't share information, they have a “less satisfying experience”．

　　Some critics think this is more about Facebook looking to make more money.

　　Its original

　　business model, which involved selling ads and putting them at the side of the pages, was a total

　　failure. Who wants to look at ads when they're online connecting with their friends?

　　The privacy issue has already landed Facebook in hot water in Washington.

　　In April,

　　Senator Charles Sehumer called on Facebook to change its privacy policy.

　　He also urged the

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