I think the kind of people who take forums/SE/wikis very seriously and have a strong belief in the Platonic ideal of their respective forum are exactly the kind

I think the kind of people who take forums/SE/wikis very seriously and have a strong belief in the Platonic ideal of their respective forum are exactly the kind of people who should be completely excluded from having any kind of status on that site. There is such a thing as taking something too seriously. The puzzle is: how do you sustain a site with unpaid "user contributed" content while you actively discourage the most prolific (and also likely most problematic) users?