I have had a few people try to advise me on solving the comment spam problems I have here. I'm sure they are correct in their advice. I am not, however, even remotely competent to go messing into the files on the website. So, I just trigger a plug-in that makes legitimate commenters type a few characters to place a comment. The downside is that trackbacks can't get through.
So just to let you know: if you're trying to trackback, I had to kick in the anti-spam tonight. They crap is arriving at the rate of 100 per hour.