Just spotted something while looking through Apache logs: 66.249.67.106 ... "GET /ajax/xr/ready?x=clcgvsgizgxhfzvf HTTP/1.1" ... This is an ajax request issued from document.ready() callback of one website’s pages. This means that the bot now executes the Javascript on the pages it crawls. The IP of 66.249.67.106 is crawl-66-249-67-106.googlebot.com and the A record is a match, so this is in fact