Nathan
Yes, the environment is full of toxic people. This has always been true, and yet it exists. You want a revolution to make Wikipedia a friendlier place? It isn't going to happen. There is no such place, at least not with the critical mass of human participants that this project needs. Have you been to a city? Have you seen Reddit or 4chan? Participated in a national election? If so, do you really think that the WMF is going to institute some sort of culture program that will solve problems inherent in human nature?
Nathan
I think we in agreement that people en masse rarely organise themselves effectively to achieve a common goal. The examples you cite, together with Wikipedia and the other projects demonstrate that well. The solution, then is not for some attempt to tweak the culture so that the desired effective organisation happens spontaneously, but for an external structure to be imposed. There are models for organising tens of thousands of people to create, curate and disseminate knowledge -- universities, schools, libraries, academies, leaned societies, ...
The Turnip