If anyone is interested in loading an avatar, go to your profile, select edit, scroll down to the picture profile/avatar section. Very easy and gives your posts the personal touch.
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 .