I have set the restrictions for commenting to the highest level. You must either:
1.) be a registered Disqus user and have verified your e-mail address or
2.) use your verified Twitter, Facebook, Yahoo or Open ID account
We get a ridiculous amount of commenting from anonymous cowards who use dopey names like ASDFSD and variants to become sock puppets (sometimes carrying on arguments....with themselves!).
Unfortunately there is no easy way to import our prior blocking now that we've switched to Disqus and rather than block 1.5 years of numbskulls all over again, I'm going this route, at least temporarily to see what happens.
If you don't have a Twitter, Facebook or Yahoo account or you can't be bothered with the Disqus registration/verification, let's face it, you really didn't wan to comment that much anyway...
If you have a registered Disqus account but never verified your e-mail, you may request another verification e-mail here.
There's a lot to be said for very open commenting. But there's a lot to be said against it, too. I'm not yet sure if this is a 2 hour, 2 day, 2 week or forever experiment. We'll see.