Not so long ago a large amount of Google documents were indexed by Yandex search engine, including very sensitive personal data and became publicly accessible v

Not so long ago a large amount of Google documents were indexed by Yandex search engine, including very sensitive personal data and became publicly accessible via search results. Not really Google mistake because documents had public access, but I personally think Google should have added no-index by default to all documents if a document is only available to those who have a link to it.