Michigan is a great school, but obviously so is Penn. Mike Santello is the recruiting coordinator there and he's a good guy. Shoot me a PM if you have specific Penn questions.
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 .