Others have reported similar errors.

In response to some of these reports, a Google employee tweeted that the team handling Google Docs was looking into the matter. Later Tuesday, Google said in a statement that it had "made a code push that incorrectly flagged a small percentage of Google Docs as abusive, which caused those documents to be automatically blocked. A fix is in place and all users should have full access to their docs."

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Although the error appeared to be a technical glitch, the fact that Google is capable of identifying "bad" Google Docs at all is a reminder: Much of what you upload, receive or type to Google is monitored. While many people may be aware that Gmail scans your emails — for instance, so that its smart-reply feature can figure out what responses to suggest — this policy extends to other Google products, too.

"Our automated systems analyze your content to provide you personally relevant product features, such as customized search results, and spam and malware detection," reads the terms of service for Google Drive, the suite of productivity tools of which Google Docs is a part. "Google’s Privacy Policy explains how we treat your personal data and protect your privacy when you use Google Drive."

If you visit Google's privacy policy, you'll find that Google is up front there, too, about the data it collects.

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"We collect information about the services that you use and how you use them, like when you watch a video on YouTube, visit a website that uses our advertising services, or view and interact with our ads and content," it says.

What does it mean when Google says "collect information"? This page says more:

"This includes information like your usage data and preferences, Gmail messages, G+ profile, photos, videos, browsing history, map searches, docs, or other Google-hosted content. Our automated systems analyze this information as it is sent and received and when it is stored."

Google explicitly refers to docs — albeit in a lower-case fashion — as an example of the type of content from which Google extracts information. I've asked Google for clarification on whether they actually read the contents of a person's Google Docs and will update if I get a response.

"This kind of monitoring is creepy," Bale tweeted.