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Google could not have found these doorway pages by crawling the site as they has no inbound links.
So either google must look at lnk or get feedback from their toolbars? Anyone seen similar?
I will try and find the thread.
Here: [webmasterworld.com...]
Dazz
Here's what Google says about "secret pages" from #6 in their Tips for Webmasters [google.com].
As soon as someone follows a link from your "secret" server to another web server, it is likely that your "secret" URL is in the referer tag, and it can be stored and possibly published by the other web server in its referer log. So, if there is a link to your "secret" web server or page on the web anywhere, it is likely that Googlebot and other "web crawlers" will find it.
There really are no secrets that are 100% safe as long as there's any possibility of a link. Then, there are some webmasters around who choose sites and without asking or getting permission add them to links pages or directories. So there can be links people don't know about, especially if they've had good rankings at popular search engines.
It could be a bit of a worry really, particularly if what you thought was safely quarantined from Google (for Ink's eyes only) is now showing up and may trigger a PR0!