Forum Moderators: phranque
Should I worry or just let it slide. The comments there were left in April and May of 2005 but still come up in Google.
It's very possible that you're just seeing the site scrapers at work here. There isn't much you can do about it if they're just including your domain name. That sounds like they scraped the SERPs of a search engine.
If your page content is being used verbatim then there are various steps you can take to prevent it. However, that depends on your system and how your site is run. For instance if you're putting everything out there in RSS form that makes it a lot easier for the scrapers to harvest your content.