Yeah, it can be brutal to see negative posts about your son or his friends. It makes you understand why celebrities say they never read the paper! Ya definitely have to have thick skin and a sense of humor.
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 .