It appears that this ‘this_is_a_test_of_404_response’ bit is also due in part to something called BecomeBot 2.3 from the site www.become.com. I don’t know why they’re doing this, but a lot of my original queries for this weirdness did come from Google. Maybe this is some kind of partnership. Who knows? But one thing is for sure in that all the IP’s from where this request is coming from lead back to Google. So maybe it’s more than a partnership. Maybe this is some other business that is in the process of being “clownified” to Google’s look. Once again, I’ve never seen anything like this in two years of log tracking, so I don’t know what’s going on all of the sudden.