alanback: No need to do anything else. Just ignore him!
Well i actually don't follow my advice and have a "conversation" with him, and i lead him into more madness. When he asks why i agree with Trice(a name that makes him mad) i respond because Trice is a nice guy etc... When he asks if i'm using a computer i respond that yes around 10 different! When he says something accusing me i respond that he is right. That makes him unbelievably more mad and angry! I stay calm as always and enjoy this very much.....