Yahoo is spidering nonexistent pages. For example: "http://www.mysite.com/?/garbage/foo/garbage/" I don't think their bot pulled this out of a hat. It looks like someone wants to make it look like I'm running duplicate content since the server returns the content for "http://www.mysite.com/". I'm not sure if I should be asking this in the Apache forum, but can anyone tell me how to fix this?
The thing that bothers me is that I brought up one of these pages in IE with the Google Toolbar installed, and I'm running adsense on the home page. So, Google, which seems not to like duplicate content, now has the bogus URL. This leads me to the paranoid thought that Y! might be doing this to degrade Google SERPS. Is that a crazy thought? Are big companies above playing this kind of game?