UPDATED, 3/4/08: Comments are on; I get an email notification of each one. High-integrity people are more than welcome here. Not welcome here are smart-alecs, trolls, or (especially) people who refuse to reveal their real names and backgrounds to me when I ask privately. As you compose your comments, the best approach is to assume that I will ask you for those. That information, if given, will be kept private; refusal to give the information will tell me just about everything I need to know.
Because of a new constraint on the time I have for managing this blog, I've had to develop the habit of swiftly banning low-integrity cowards -- and it has been working well. I wish I'd implemented that policy sooner.
Anonymous commenters have been and will continue to be ignored.
Aside from the usual things that get commenters banned (profanity, etc.), one of my pet peeves is the ad hominem attack, also know as the personal attack. It’s when somebody finds it more difficult to address the topic than to attack the person who raised the topic, and even college professors have displayed a startling immaturity by resorting to it (... "so-and-so is the stupidest person on the planet" or "dumbest person alive", etc.). At several other blogs it has pretty much ruined things for objective commenters, but I won’t let that happen at my blog. Also, if you want to call me names, feel free, but please use email instead of comments. It’s easy; my email is undisguised (thanks to gmail’s excellent spam filter).
UPDATE, 3/30/07: Also, if you want to preach, or to argue solely by quoting others, feel free to put that stuff in a private email to me, instead of posting it as a public comment.