Yes, the system doesn't work. When Usenet died it got replaced by forums and the old trolls got granted admin rights. The non-sane people that have a lot of time to post all day end up with the highest reputation and privileges.

On the other hand closed groups of experts also don't work. I once knew some really extreme religious guys - pretty much flat-earthers. They were all heading for bioscience and networked like crazy - they got jobs in academia. Lonely brilliant scientists didn't.

Most likely a lot of science-communities have already been overrun by "networks".. Maybe the era of rational thinking is coming to an end.