I had never heard of referrer spam until I read this article on the Lorelle on WordPress Blog. It was written by Michael Hampton
Right around the time you realize that people you don’t know are actually reading your blog, you probably are going to start checking your stats to see where in the world they’re coming from. Your web host gave you a package like awstats or webalizer to generate nice statistics and graphs for you, and you go through it looking for the search terms people used to find you and the sites which linked to you. You check one out, and suddenly you’re at an online casino, or a porn site.
You’ve been hit by referrer spam. Read the rest of Battling Referrer Spam