Oh, definitely do what Sugar Pixie Sweets says about providing support of the same height on each side. That helps significantly and I have found that it makes a big difference.
When you block a person, they can no longer invite you to a private message or post to your profile wall. Replies and comments they make will be collapsed/hidden by default. Finally, you'll never receive email notifications about content they create or likes they designate for your content.
Note: if you proceed, you will no longer be following .