Things you do not want Google to see.
I get the feeling that there are many types of things webmasters would like to keep Google from going to. One example is this: Link One, Link Two. The originals have been removed, but Google keeps a copy for posterity. Of course, the police could ask Google to take it down, and they probably would, but, hey, why bother?
(I’m only publishing that here because I’m sure the passwords have all been changed, and it’s been published elsewhere.)

















