We have 8 users on our workgroup and all see different numbers of opportunities. They have been assigned to public, so that is not the problem. Anybody else has the same issue?
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 .