He was warned several times, then when the moderator put his foot down and said to stop the personal insults or else, he threw one last insult calling the poster who complained to the moderator a whiner and vanished.
He was a sad case.
You two used to go round and round, but you both gave as good as you got - would you have demanded that he be tossed for what he said to you? (Did you?) And he was as hard on you as anyone at all. Yeah, DJ was over the top sometimes, but most people weren't thin-skinned enough to take it all that personally.
Of course, keep in mind that I was shaped by Usenet long before I landed here - DJ at his worst here was about half as bad as a good opening cheap shot from people who were just getting warmed up on Usenet, so maybe my perspective is skewed ;)