I think a "just let it happen" attitude like Google Adsense's with fake clicks problem may be the solution. Google at one point decided instead of fighting bots

I think a "just let it happen" attitude like Google Adsense's with fake clicks problem may be the solution. Google at one point decided instead of fighting bots and publisher's tactics to click on their own ads decided to allow the fake clicks reasoning that if the actual person click on the ad is not going to buy a product the ROI of the ad would drop on that particular publisher's website. Over time the system would correct for itself and just show fewer ads on that site or lower its cost per click for ads shown on it, hence solving the fake click problem in a clever way. I think if we employ the same tactic and let polarization happen online there will be communities where the ROI of discussions drops exponentially and there will be places where less of that stuff happens for whatever reason and they will be the truly engaging places to hang out online.