Outside of OS I had to check this, and it's more complex if you are in EU or have EU residents, because of GDPR. I couldn't proactively scan their logs (the software for that is out there). The best is a robust, GDPR compliant ToS + reporting system - which allows you to investigate + automatically destroy + ban if a report is made (you are actually legally FORCED to) + make available to authorities if needed. But any proactive scanning in EU can get you in as much trouble. The eternal battle between safety and privacy.
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