A few lines, in no particular order:
Inconsistent moderation, whether real or imagined, is a huge problem and needs to be avoided at all costs. It undermines the TOS.
Moderation will always be inconsistent. I can invent a large number of rules to fit the majority of situations, but nothing will ever be absolute. As it sits, the only thing you need to moderate is low effort, no-contribution posts. Delete the rest, but leave the stuff of substance, and encourage people to post things that are substantive.
There's been plenty of inconsistent moderation over the years, simply by human nature, and yet we're still here, aren't we?
Vague rules are an issue. Many will not vote/act unless the offender has violated a CLEARLY defined rule.
Maybe the problem is that you're attempting to define the rules rather than the results you want to see and letting the rules build from the best course of action around results. Maybe the reason that many don't vote or act is because any clearly defined rules is needlessly specific and not applicable to most situations, so in your quest for clearly defined rules, you lose the ability to effectively police negative behavior on the forums, because you're holding up the law as the ideal, rather than the community you want to see.
I can tell you now that we spend less time removing posts than we would if we had to discuss individual comments in a thread.
And why would you have to discuss the posts to remove them? It should be pretty easy to delete one post that says: "400 bucks lol" vs. "Your motorcycle is worth $400 to me because there are these comparative bikes available for 300 bucks, 400 bucks, and 200 bucks. Your asking price of 1.5k isn't in line with the market. If you'd like to sell the bike for something in the range of market value, send me a PM".
I personally think BARF's moderation style is really, really, not scalable - it's better to turn over the subforums to the mods of those subforums, let them run the rules as they see best fits the environment. What is best for the KS is obviously not what is best for General, or the crash forum, or whatever else. And bringing in other mods to moderate those areas seems to defeat the point.
But that's neither here nor there.
When it comes down to the truth, the truth according to who?
There are no absolute truths, so attempting to define the rules as you propose is ultimately futile, and something that you can always consistently hold up as a reason to not change. You're carrying out an intellectually dishonest argument by setting an impossible task (clearly define rules to address situations that aren't clearly definable!) and then claiming that because of that, we shouldn't change the rules.
The currently in place rules are needlessly specific, and that's what makes it easy to fuck with them - as long as you don't outright call someone an asshole, you can tell them they're an asshole all you want. The behavior is still there, it's just couched in flowery terms. The same is true of "GLWS" in the classifieds - the translation is "Your shit is overpriced, lol", but no one can actually say that, and unlike not calling someone an asshole, there's not really a good reason for it. People are saying it anyways, after all. It's just marginally more subtle...just enough to fly over the heads of new riders trying to find decent deals on bikes, which ultimately doesn't serve the needs of the riding community, nor does it make BARF a better environment for people to buy or sell bikes than craigslist.
And again, if the goal is to make BARF like craigslist, then someone should just out and out say that. But I think the idea is more to create a supportive, useful community around motorcycling in the bay.
So far, what you are proposing will increase our workload.
Only because you seem to believe that any change from the status quo requires mod consensus to make even the smallest decision about deleting a post. You're relying on narrowly defined rules to make moderation easier, without focusing on the outcomes for the community vs. the moderation itself.
At the end of the day, this shit isn't rocket science. Yeah, mods are going to misstep sometimes, that's a mistake and you apologize and everyone gets over it. Users are gonna get bapped sometimes for the wrong reasons, shit happens. I think that rather than striving for an unenforceable ideal, it's better to realize that we're all human, ask forgiveness on occasion for when we fuck up, and try and learn from it. Maybe after a month or 2 we'll see the pattern that we should form the rules from, maybe after a month or 2 nothing will have changed, maybe it'll make the forums more useful. But you can't establish that without trying something new, although you can forever argue in favor of the status quo, just like any dogmatic practice with the weight of history and inertia behind it.