I believe that if you have Outlook 2003 then you can sync Maximizer to Outlook, then Outlook to Blackberry. This will sync your contacts, appointments, and hotlist.
If you have any earlier versions of Outlook then you will only be able to sync your contacts and appointments.
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 .