Facebook has exposed you. Not yet?
How public is your Facebook page? Do you care? Who is searching for you? Your future employer? There is a website called Zesty.ca/facebook. This website tells you what is publicly available to the whole world. Just recently some people scraped Facebook and bundled a lot of public data and put it up as a torrent. Many people have downloaded that torrent since. Could you be in that bundle? Make sure you are 100% in control of your profile. Go to the website to to see what is public. "To find your Facebook ID or alias, go to your Facebook profile and look at the URL bar in your browser. If you have a numeric ID, it will appear at the end of the URL. If you have an alias, it will appear right after "facebook.com/".