Randall, the problem with the cited articles is that they don't actually name any groups or individuals, or provide any actual examples of the said myths. Now I assume that the leg wounds article is mostly addressing the SCA, who are known for fighting from their knees and not targeting the lower legs, but how is the ordinary reader supposed to know that? All they get from the link is vague intimations that somebody, somewhere thinks fighting from the knees is realistic. The other cited article is even less specific.
Ideally, to cite a myth/misconception you should link to an actual case of someone stating that myth - e.g. an article stating that swords weighed 30 lbs - and then to a rebuttal article, or to an article that gives the source of the misconception as well as a rebuttal. Otherwise the reader has no way of knowing that the articles are actually addressing a real argument, rather than knocking down straw men.