>>dang+K61
Those who favor prohibiting political discourse are only mildly in favor -- even if it's allowed on the site, they can simply ignore any threads with political content and approximate the same effect in terms of user experience. They are thus less likely to bother writing, since it doesn't make as much difference to them.
Those who favor allowing political discourse, however, are angry, since there is no substitute, other way to approximate "discussing politics with the HN community" other than doing so on the HN site.