[nickconfer]

This is not correct. With Google now having Chrome and other tools, there are many ways for Google to find out a URL exists.

You may want to send a follow up email with a quick link for the user to add a noindex meta tag to the page, or even password protect it.

[mailpin]

Thanks!

We just did a release to address this problem. Now, <meta name="robots" content="noindex"> is added for each single page.