Earlier quoted context omitted.
A few years back people were getting messages from Google if their docs contained hate speech. Google's response was that it was a corporate feature that was accidentally turned on for all accounts. So they certainly have infrastructure to do deep content scans of all users docs. Realistically they probably do still scan all accounts for internal metrics, it's just notification that has been disabled.
Do you have a source for that? I can't find anything with searching that Google ever algorithmically identified hate speech in Docs & Drive, there's no such corporate feature that can be enabled in G Suite control panel, reliably identifying hate speech is a hard problem that there's no indication of Google having solved, and honestly the entire thing sounds like an urban legend. But if you have a reputable source I'…
https://www.vice.com/en/article/zmz3yw/why-is-my-google-doc-...