They could even link back to the threads in which they were addressed. I know for many topics it wouldn't be possible to conclusively say something is a misconception, but for some wouldn't it be? For instance, Nero fiddling or the drinking water one that's been popping up with this week's theme.
Could you clarify what you mean by 'something in plain sight'? We are pretty limited in what we can do, after all, in terms of visibility! We have limited sidebar space which we try to save for "BIG THINGS!", so the Wiki is really all we have for second-order stuff, which this would seem to fit under.