I voted to "Leave him be, he represents valuable opposition."
Despite his broken-record mantra ("economic rent economic rent economic rent"), he does have an interesting point now and again. I think he is not very good at debate - he doesn't fully address his partners' points and sometimes he ignores them altogether.
I almost voted "Don't respond to his posts, because it gets us nowhere," but I think it would be better to, in each topic, reply to his original post once and then if he repeats himself and/or ignore your points, then ignore him.
I think "Make his life miserable, God knows he's done it to us" and "Hunt him down and kill him, he's compelled us to labor for our existence for too damn long!!" are rediculous options, and not very libertarian considering he has not infringed any of our rights. Surely the last was made in jest, though.
To "Petition Ian and Mark to ban him, he is basically a spammer" is not wise, as it would be a step in the direction of turning this very free forum into a limited group.
- Mike