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Need to be clear on the purpose of "no-index".  Search engines will still crawl the page, but in theory will not be published in the index.  Some search engines may still choose to index the page despite no-index tag.  Also that page will still be publicly accessible on your website. As already noted a couple of times I would be very slow to noindex any page. I can't think of very many applications where it would be used. The way I view it is either something is public or its private, if it's public you properly want search engines to find it, or if it's private it should be locked away behind a username and password.