You've definitely seen it, maybe you've done it, I know that I'm guilty on both counts.
You have a relatively well received diary, and you get a fair number of posts, generally more than 20.
The diary does not make the recommended list, so it then drops off everyone's radar, except for two posters, who have go back and forth, generally for hours, and sometimes for days.
So, what do you call this? There has to be a name for two posters duking it out on the waste heap of a long forgotten diary.
I'm not trying to make fun of anyone. I've done this, but if it had a name, we could tell people, "Stop %%%%%%."