I went back and read the rest of the article about bots, then went and looked at my own access logs. I only found one robot that he mentions, the Turnitin bot, but it appeared numerous times. I'm not sure why I should be concerned about whether or not anyone is copying my work and turning it in as their own schoolwork, and I'm not real excited about paying for the bandwith for their robots to hit my site thousands of times a month. So I banned them, using the directions here for modifying my .htaccess file.

And then -- oh, this is priceless -- I went to my own site and typed a URL wrong accidentally, and got the generic 404 message page, not my own customized page. So I've obviously screwed up the .htaccess file. I put it back the way it was. These are professional drivers, don't try this at home.