Here are the current contributors to the debate: http://commons.wikimedia.org/w/index.php?t...&action=history
I do this to illustrate a point. The 'editors' here represent extreme and opposite viewpoints on sexual content seen in the recent uproar. (Although the advocates of including hard-core pornography seem to have the advantage). And that as I have commented here many times is the Wikipedian way: any controversial issue will attract only the extreme proponents on each side. Neutral views tend to be excluded for many reasons, including the fact that people with neutral views aren't that interested, and that no sane or reasonable person would be editing Wikipedia in the first place.
Contrast the Wikipedian system of polarisation with the way it happens in real life, which is the very reverse. The system in most societies is to have a class of people called 'the great and the good'. These are people who have worked their way through 'the system' in business or academia, or even (as in the UK until very recently) to have inherited privileges. I am not saying this is a brilliant system, far from it, but it does ensure that the end product is socialised and normalised in some way. You can't work your way up in business or politics without some appreciation of how to deal with people, and to appreciate both sides of an issue, you can't succeed in academia without the ability to judge a position neutrally and by considering the evidence on both sides in a detached way. Also, the power and influence that results in being nominated for a committee of the great and good is an incentive to attract the truly neutral. I am not saying it's a great system - it has a tendency to corrupt, and a strong tendency to preserve the interests of a whole class of people that don't represent ordinary society.
Oneof the fascinating things about Wikipedia is that it is a laboratory, a work in progress, for a society that is run in quite a different way, radically different from the old one. My view so far is that the old one, for all its flaws and inherent defects, is in all respects superior to the Wikipedian model.