how do you block your friend list on facebook?
 Log in to your Facebook account. Select the Privacy Settings option under the Account tab in the top right corner. Click the View Settings link in the Connecting on Facebook section.Scroll down to See Your Friend List and click the drop-down menu to the right. Select Customize from the drop-down menu next to the These People option.Choose Only Me from the drop-down menu in the resulting window.Click Save Setting to make your friends list invisible. 