Attempting to use moderation to regulate the opinions members have and express, would likely be doomed to failure and is arguably not relevant to the mission of the site. Conduct, on the other hand, is something that can and should be managed through the Terms of Service, User Guidelines, member communication and - when necessary - moderation.
If somebody calls me and idiot in a post, it's not their opinion of me - that of being an idiot - that's a violation of the ToS or guidelines. In fact, it may be true that I am an idiot. Regardless of the intent of the person making the post or even of the accuracy of the statement, "Bill's an idiot," it's an insult. Nobody likes being called an idiot...and for good reason. It's demeaning and justifiably considered inappropriate conduct by a member of a community, especially one built around the goal of fostering open, productive discussions amongst people who share a common interest.
The same standard can be applied to political, spiritual and cultural beliefs. This is an international community. The diversity of thought, in my opinion, is something to celebrate. At the very least, it is something to foster. Everyone, regardless of their opinions and beliefs in these deeply meaningful areas, should be able to feel comfortable as an active member of this forum. That standard can also be applied to our opinions about photographic equipment, techniques and even the photos shared in the forums. It's not our opinions on these topics that cross a threshold separating appropriate and inappropriate activity. It's our conduct that can cross the line.
If my posts are insulting, intimidating, bullying or otherwise aggressive towards other members - regardless of the opinions or facts stated - other members would be justified in publicly calling that conduct out and asking that I temper my voice. It's a reasonable expectation that, whatever the purpose of my posts, I'll make my point in a manner that is respectful of others. The best way to do that, is to avoid getting personal when a discussion leads to a point of fundamental disagreement. Keep the discussion focused on the topic. Don't stray into trading personal barbs.
In summary, my hope is that this still new forum will focus on conduct as opposed to opinions as having the potential to be inappropriate and deserving of moderation. Embracing the banner message on the landing page, "the community-run digital photography resource," I would also hope that members will feel comfortable about taking the first step to notify another member when they've crossed that line. If we can self-regulate, that will help facilitate an atmosphere where formal moderation is only needed and only occurs in the rare instance of a person who repeatedly treats others in a disrespectful manner.
That's a goal - moderation only on the rare occasion it is needed - I would hope we all can embrace.