I'm not deleting my account. I only signed up because I was using the Facebook API for something once and needed an account to test. Other than that, I occasionally post links to news, pictures (look at my food! look at this funny animal!), and I check on groups that I belong to, especially the trading ones. The groups are especially useful. I also only ever log in from a single place, my mobile.
It always amazes me how people use it. What did you think was going to happen to that data? How do you think a service as large as Facebook was paying it's bills? People don't need to stop using Facebook. They need to sit for a second and think about they are using it.