How do I block my FB profile?

[Hm]

After following these steps you can easily block.
1.Go to "edit profile" and edit the privacy settings for each section.
2.There should be a little icon next to each piece of information you enter (hometown, contact info, birthday, etc.) that will appear as a little globe icon when your information is public to all on facebook.
3.You can change it to friends only, or even "me-only." Remember to hit save on the bottom of the page after doing this, as it doesn't automatically.