Congratulations! The same thing happened to my son three years ago and I remember it like it was yesterday. Good luck to you and your son! It goes by so fast so enjoy. Although that is almost impossible when your son is playing in the game.
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 .