(1) Find a comment by the person you don't value. (2) Click on the arrow to the right of the comment. (3) In the drop-down, select Mute User. Result: You won't see comments by that person, and if they are an Author you won't see their articles or receive email alerts of articles by them. FYI: Free users currently have 3 mutes, paying subscribers unlimited Mutes.
Customer support service by UserEcho