Cav, There are no restrictions on when a player may contact a coach in any manner. You can call, email, show up in person on campus. The only restrictions are about a coach making contact with you.
They may email you back at anytime.
They can only call you after (someone correct me if I have the date wrong), June 1 after your junior year. That means that you can call them anytime. But if you leave a message, they are not allowed to call you back unless you are past the June 1 date.
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 .