Of course, this is just an example, there are enough information left if you know what to look for. I am not in to 0 day exploits, this was just a dated example. But I have seen what people could do with a browser tool and a special weak cgi list.
If you want to see what google can do use niktoogle. http://www.frame4.com/cms/news/downloads/niktoogle_1.0_20030606524.html
Web site developers should exclude what they don’t want checked by the search bots like google using robots.txt file.
User-agent: *
Disallow: /cgi-bin/
Or any other locations that they don’t want indexed. Google isn’t responsible for poor site security. At least Google is giving a way to remove data that it has indexed.