rpm, the character you speak of is quite obviously an attention hound, albeit an insecure attention hound. By putting the "dirty laundry" out on the line for everyone to see, you're falling prey to his twisted thinking.
Wanna make this guy go away? Pay him NO ATTENTION. Zip, zilch, nada. Chances are, he'll be even more of a PITA for a few days but then he'll get the picture (hopefully) and go away. If he doesn't, call his "good friend" Hitech
Good luck!