The comment system I used is fairly robust, and could prevent some types of comment-spam (comments that are either outright commercial messages, or worse, those that contain malicious JavaScript code). But not all of it, and while I had some useful cron scripts catching most of the rest, it just got to be too much of a hassle.

So, from now on if you want to disagree with me, you'll have to actually e-mail me to do so...