Anyone who has a blog has probably seen blog spam; comments to the blog that simply try to entice people to go to some other site. Most of the time the site being advertised is simply trying to boost its search engine rankings to generate more ad revenue.

The more links there are to a site, the more popular the search engines figure it is, and the higher up in the search results it ends up. Blog spam, therefore, is frequently thought to be a good way to boost the search engine rankings. In some cases this turns malicious. Some sites engage in wholesale intellectual property theft to boost their rankings.

A few of weeks ago, however, I started noticing something far more insidious. I moderate all comments to my blog. This is something I started years ago to keep the blog somewhat family friendly, and to avoid propagating malicious content. Recently I also completely disabled trackbacks to avoid boosting the search engine rankings for sites that steal my work. This means I see every comment that comes into my blog. The other day I noticed one that contained nothing more than a link to a fake Google site: google-images.google-us.info/index.html.

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