They will be doing maintenance on the message board website this Wednesday, July 20, 2016. It is likely there will be a 2-hour period sometime that day when the Bulletin Board will not be available.
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 .