As there are millions of examples of them finding culprits and getting it right. I may not agree with the punishments, but I think your argument breaks down outside of a very small close knit community of people who practice consensus decision making.

You can't just plop down community management without the culture to make it work. These tools are missing from most communities and would lead to as many negative results if not more.

We don't even need to create hypothetical examples of this because we already have many historical examples of community management gone wrong like the Salem Witch trials.

I think you need to seriously address this before you can shout community management as a panacea.