What I think would fix this, is better developer metrics and statistics. If every post to the python-dev list was automatically tagged with some sort of metric for that persons contributions to the project, it would go a long way to identifying, and triaging, the most violent vitriol.

Something like code contributions, amount of churn, speed of implementation, level of correctness, etc. Trouble is, I don't really see any quick "just insert batteries" method of adding such metrics to an open-source programming community - perhaps someone knows of a great system of reports for measuring developer productivity through a repo or something? I guess it would also have to accommodate dev-ops and marketing efforts by developers, too. Hmm .. maybe this is a startup idea in the making ..