This is an experiment to see how Googlebot crawls pages with special URL parameters.

The question is: When there is a URL parameter with a character in it that needs to be URL escaped, how do you keep Googlebot from crawling it? Here are some links to various versios of the experiment. Each link has a url parameter with a percent sign (%) which is URL Encoded to %25

Version "escaped" links

Version "un-escaped" links