If another user is bothering you, or you just don’t want to communicate with them, there are a number of ways to block them from contacting you. You can block a user on the Friend Request page, while viewing a message in your inbox, from a comment on your own profile page, or from their profile page.
Here's a quick How-to video that shows you how to block another user
To block someone who has sent you a friend request:
Click a pending Friend Request alert, or hover your mouse over the People drop-down in the top navigation bar and click Friend
Find the user you don't want to communicate with and click the "Block User" link in the request module
To block someone who has sent you a message in your inbox:
Click the “Yes” button to finish blocking the user
To block someone who has left a comment on your profile page:
Click on the arrow on the right side of the Profile link in the top navigation bar to open the drop-down menu
Select View Comments from the list (note: you can also do this from the comments module on your profile)
Go to the comment from the user you want to block
Click the “Report Abuse” link above the comment
Select a Reason from the list
(If Required) Enter additional info to describe why you are reporting this user. Please be as specific as possible (e.g. "This user sent me a comment with a link to www.FAKEtaggedLOTTO.com and told me to contact them at REAL_LOTTO@email.com to claim my winnings of $10,000")
When you've completed the entire form, click the 'Submit' button
Click the 'Block' link in the green confirmation message, then click the 'x' in the top right corner to close it
To block a user from their profile page:
Go to that user’s profile page
Clickthe 'Block User' link to the left of their profile photo (note: If you are also reporting the user, you can block them via the Block link that appears in the report confirmation message in the screenshot below)
After you’ve blocked a user, they will appear in the “Blocked Users” section of your Account Settings. You can view this list at and remove users from it at any time by:
Hovering your mouse over the Account drop down in the top navigation bar
Click on the Settings option.
Scroll to the “Blocked Users” line and clicking 'Edit Blocked Users'