About a week ago, I set WordPress to automatically close comments on posts over 90 days old on my Reclaimer website. Spam comments over there have become completely unreasonable lately, with Akismet catching and filtering out upwards of 300 spam a day. The vast majority ended up going into the Pending queue rather than the Spam queue for whatever reason. No big deal, mind you; it was only one additional step to filter them into the Spam buffer and then out of the system completely, but it was becoming a tad annoying. That was when I decided to try closing comments to see what effect it would have on spam. Very few of my readers, even new ones, ever comment on the old archives anyway, so cutting that section out of dialogue was no huge loss.
I also use the IntenseDebate commenting system on all my WordPress installations. I was puzzled to discover that setting WordPress to automatically close comments had no effect on IntenseDebate. I spent a little while trying to figure out why before finally giving up and just accepting that something somewhere was broken.
Probably I should have realized how this worked sooner, but sometimes I’m just a little slower on the uptake.