If you had to resort to using an xacto, plus 3 attempts with alcohol, that indicates it was “Heat Stamped”, not Rubber Stamped. Most rubber stamping will come off with warm water, plus alcohol as alternative.
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 .