It would be helpful to know more. For whom? For what purpose? What portion of the populace? Do you have a hypothesis or do you just want to screen for ACEs in the FWT area? Are you a student, or affiliated with a university or health agency?
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 .