Even if the error turns out 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.
Google admits they scan your email and monitor and log everything you do online. Per the reporter, Google would not say whether they read your Google Docs documents.
There are good reasons to avoid using Chrome, or cloud services like those provided by Google “for free”. Remember, when its free, you are the product that is being sold.
Update from Google – apparently they do scan our documents.
This issue should now be resolved and you should be able to access your files.
For more details, this morning, we 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. Protecting users from viruses, malware, and other abusive content is central to user safety. We apologize for the disruption and will put processes in place to prevent this from happening again.
Google Docs Community