This is interesting. I’ve noticed that most of the hits on my site come from host-148-244-150-58.block.alestra.net.mx. A little digging shows that “it’s been a major spammer”:http://www.google.com/search?hl=en&lr=&client=firefox-a&rls=org.mozilla%3Aen-US%3Aofficial&q=%22host-148-244-150-58.block.alestra.net.mx%22&btnG=Search of blog comments and Wikis.
In general *.bloc.alestra.net.mx is a major source of spam on my site. I’d like to block the whole ISP at the webserver level by modifying my .htaccess file. Looking through my logs, it looks like 148.144.15.X and 207.248.240.X are the offending address blocks.
That should help.