I am wondering if one should install a refereeing system. We will (presubably) have moderators, who will remove posts that are offensive. That is, they will make sure that how we say things is fine, but not so much what we say. But then we will have still posts that are polite (or at least not offensive), but wrong. 

Therefore we might think of having referees around who will mark (or even delete) posts that are just wrong. 

Or, if we want to avoid the controversies that may arise from deleting posts, we may think of having referees "validate" posts. This would be a bit similar to the refereeing system in academia (or at least the idea that underlies this system), where virtually everyone can post something on the arXiv, but it is a bit harder to get the paper published in a refereed journal.

Of course, this would mean some extra work for the users here, but in my opinion it would pay off since this will improve the quality of answers quite a bit.