Maybe we can have a fact-check community. People could post there if they find fake news or they could request fact-checks of information by others. It should be a community with strict rules on referring to sources, creating valid arguments, etc. and content should only be banned if it does not adhere to these rules.

A bit similar to what happens in scientific research. I will reject a paper if there are issues with its methods. I will not reject it based on its conclusions if the methods are fine. I think this works in academia, why wouldn't it work with the right moderators here? There are still a lot of people who value truth above all else and in this way, they would have a space here.