In your Eve Control Panel, go to Eve >> Members >> Profile Settings. Certain fields are always required, but otherwise you can determine which profile fields you wish to have listed as either required or optional (or disabled entirely), by choosing from the lists. You can also create custom profile fields.
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 .