@jerry Sadly, I think the preponderance of evidence suggests that a "wild west libertarian self-organizing environment" (the dream of the early-90s Internet) will devolve into a Nazi troll farm 100% of the time with absolute certainty.
It's a wonderful idea, but doomed.
The barrier to the accept-list could be low (eg, do they have a halfway decent TOS/CoC), but I don't think we have an alternative.
cf: https://peakd.com/community/@crell/why-you-can-t-just-ignore-them