How Do I Block Someone?

Select 'My Profile' at the top of the page. From the drop-down menu select 'Settings'. A new page will appear with several options. Select the 'Privacy' tab to open your privacy settings. The first thing you'll see is the 'Block List' section. Select the yellow 'Add New Person' link. When the text box appears input the Username of the person you want to block. Scroll down and select 'Save Changes'. 

You can also block another member by navigating to their profile page. Just below the profile pic you'll see several text links in yellow. Select 'Block this person' and the member is now added to your Block List.