I've removed the comments from my blog. You can still get the old ones, but I won't be reading them going forward.
My blog is my space, my publication; I'm not running a message board. Every time someone posted something rude or dumb I winced. And when someone posted something smart I got frustrated because I didn't have a good way to discuss it with them. So from now on, if you have something to say please email me.
Many thanks to QuickTopic, who runs a great reliable, free, simple discussion board service.