I installed my own and can highly recommend this company, they really have good service. Programming the new panel is the hard part and they walk you right through it. My system was priced to me installed at 2600 and I spent about 900.00. and they have life time support. http://www.homesecuritystore.com/default.aspx
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 .