@coldjoint,
I don't entirely get why the moderators pull some posts and leave others. Many outrageous attacks against me have been removed over the years, but now and then an attack against me is not removed despite it being pretty outrageous.
Other times there have been posts against me that I thought were pretty harmless and even funny, and suddenly they vanish.
I would guess that his posts do not quite cross the line into personal attacks against me. But since I don't entirely understand where the line is, who knows.
Sometimes the moderators act against long-running feuds and delete a bunch of messages. At some point they might start deleting his lies under that rule.
I don't plan to complain since his lies are not terribly grievous. It seems to me that simply pointing out his inability to back up his accusations is sufficient.
I won't be surprised though if a bunch of his posts suddenly vanish when it gets to the point that his vendetta is derailing threads.