One thing to remember...as we learned with issues with our travel team many moons ago... ...the more detailed and more items included in the contract, the more you have to enforce, and the less wiggle room you give yourself.
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 .