I accept your criticism in the spirit it was intended - but I'm not sure you are stating a local consensus instead of your personal preference. Consider the recent exchange I was involved in. It doesn't appear to me that the more wrong party has been downvoted to oblivion, and he should have been by your rule. (Specifically, the Main post has been downvoted, but not the comment discussion)

Philosophically, I think it is unfortunate that the people who believe that almost all terminal values are socially constructed are the some people who think empiricism is a useless project. I don't agree with the later point (i.e. I think empiricism is the only true cause of human advancement), but the former point is powerful and has numerous relevant implications for Friendly AI and raising the sanity line generally. So when anti-empiricism social construction people show up, I try to persuade them that empiricism is worthwhile so that their other insights can benefit the community. Whether this persuasion is possible is a distinct question from whether the persuasion is a "good thing."

Note that your example is not that pattern, and I haven't responded to Clueless. C is anti-empiricism, but he hasn't shown anything that makes me think that he has anything valuable to contribute to the community - he's 100% confused. So it isn't worth my time to try to persuade him to be less wrong.