I’ve been thinking for a long time over such situations (I am not sure I mentioned Game Theory). I remember in private chat with you, I mentioned enlightenment.
The only way to improve something is to educate the people. The wrong assumption (especially in the West after WWII) is that with rules, we can have conditions to improve as society when in the same time we invest less and less in education (especially the quality).
So my solution (and I do not know if it works) would be not to find another algorithm that will undoubtedly fail, but to have people who are experts in argumentation and can educate (off forum) participants in such disputes, thus reducing the quantity and increasing the quality. In normal life we have the judge. Unfortunately this is also not good enough.
Can AI help? Some years ago there were attempts to formalize speech and meaning i.e. Prolog, but it turned out it is also not working as expected. Why? There are many reasons, but at least one of them is crucial - the soul … or something we can not exactly explain if you wish. To make it short it is “you” - everything you experienced, thought etc. makes you think in specific way and take specific decision.
Conclusion: Trough education and examples, we can set up some rules that qualify a post and there should be discussion around why someone flagged the post or not and if it should be hidden or not. Community can vote and a judge can decide in case of further discussion.
We can elaborate on this if someone is interested. I do not think it is appropriate to go into details here