You have to process every post in order to monitor it. So what you need to do is have a system to run these posts through. One, with a simple but expensive Google API like Cheetah (Cheetah is a 'similar content' bot that searches every post for similar wording via Google). Two, with a reporting form (simple too). Three, with custom reverse engineering tools to detect not only AI but translations from obscured sources (creation of this would be the most expensive part). Four, with "account history". There's no way to avoid massive infrastructure and extremely high costs in development and operations. I believe Tiktok and Facebook are attempting to create similar scale models. Not saying its impossible, but would be more complex than anything else ever built on Hive. It's an interesting concept though that would push anything ever built on any chain. Whether it would be ethical to build is another question.

Regarding Discord: even if a comment is clear on chain people don't read it or want to hear the answer again. That's just human nature. We took out the auto comments which spam the chain and other pre-Hive-related protocols. Those prevent the person from appealing and moving on.