What's the use of speaking this mumbo jumbo if no one understands? "Tongues" had a specific use in the immediate years after the church was established. "Mumbo Jumbo" simply turns people away from Christ.
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 .