Do you know if google index your pages ? and how it can find all the pages or links ?
If you simply create a post page and keep it to yourself or share in a closed social network (e.g., IM, facebook private group ...) that cannot be indexed by google, then you are good.
That said, you decide to what degree you want to share your page.
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.
We just did a release to address this problem. Now, <meta name="robots" content="noindex"> is added for each single page.