February 01, 2006
I've been getting pounded with comment spam lately. Spammers use automated scripts to leave comments on blog posts. The comments contain links to a website whose search engine ranking the spammer is trying to boost. (The more sites that link to a given site, the higher the rank assigned to it by search engines.)
Comment spam is a pain because I have to go through and delete the comments manually. To block most such spam, I'm instituting a new policy. Comments will be closed on posts that are older than some specified number of days. I'll have to experiment a bit to find the right interval. At the moment, it's set to 30 days.
So the upshot is: if you try to comment on an old post, you may be blocked. Now you know why.