That was indeed interesting, that "for every bad contribution prevented, seven good ones never happened". However, while it is easy to measure, I'm not convinc

That was indeed interesting, that "for every bad contribution prevented, seven good ones never happened". However, while it is easy to measure, I'm not convinced that "number of good contributions" is a valid proxy for "quality of discussion" or "quality of content". For example, some of those good contributions might have been repairing the damage made by bad ones. And on a less heated/combative forum, users may feel comfortable consolidating multiple small contributions into fewer but more well-thought out contributions. And perhaps even the good contributions that were prevented were (while good) on average lower quality than the ones that remained.