Facebook offers a great -- and free -- way to connect with friends and family, but if you are not careful about your security settings, your site activity can be published for anyone to view. Comments you leave on other posts, for example, are displayed and made available for liking and commenting by other users as well. With user blocking enabled, you can unfriend specific users and hide your comments from their view plus prohibit the user from communicating directly with you on Facebook. Other privacy settings allow you adjust the overall audience of your posts and shared items.

Block a User

Step 1

Click the "Privacy Shortcuts" icon, resembling a padlock with three horizontal lines, at the top right of any Facebook page. Select "How do I stop someone from bothering me?"

Step 2

Enter the name or email address of the individual you wish to block and click "Block."

Step 3

Select the person you want to block from the list of users that dislays. Confirm your request to block by clicking "Block [User Name]."

Individual Post Privacy Settings

Step 1

Click the "Friends" drop-down next to the "Post" button on any new post -- for example, a new status update or a shared link.

Step 2

Select the audience for your post. See Tips for information about audience selection.

Step 3

Click "Post" to make the post live.

Past and Future Post Privacy Settings

Step 1

Select the gear icon at the top right of any Facebook page and select "Privacy Settings" from the drop-down menu.

Step 2

Click "Edit" next to "Who can see your future posts?" and adjust the audience for all future posts. Additionally, you can limit previous posts by selecting the "Limit Past Posts" link, clicking "Limit Old Posts" and then "Confirm." See Tips for information about selecting an audience.

Step 3

Click "Close" to save your privacy setting changes.