Why bother engaging him though? His point is not to interact with you, it is only to get a response. So the only way to win is to ignore him. The fact that he's been doing the exact same gimmick without growing tired shows you what sort of person he is. The fact that he tries so hard to have power over people in some capacity speaks to something he lacks in real life.
Use the ignore list as he isn't worth the time it takes to realize the posting is his, let alone respond to him.