I'm glad this thread was reopened. These sexism allegations are... Well let me first say to this anonymous individual, I sympathize with you. The world is a cruel place and not just to the cause of women, either, remember that. Other camps and constituencies face adversity. But let me allieve your fears.
Here is what I saw happening early on. The beginning of the thread had nothing to do with sexism, and was simply a prompt for a larger recurrent cultural debate, indeed the polarity, in our society. So the prompt could have been male, it could have been something else too. Look at our society! Competition and hatred prevails everywhere in excess. To the distraction of many important issues. People keep moving along in their confines, unquestioning, but this manner undermines all they think is still preserved. We have intense partisan hatred and divide in this country. Many hot button issues gravitate around this polarity... Hatred and contempt for our fellow citizens. Notions of hard work, blue collar, notions of class, notions of legitimacy, it goes on and on. "millennial" hatred and blame, old versus new, professional versus sloppy, hippie vs what not. So I saw this thread, at the beginning, as being precisely about this. It wasn't sexist, it was a spark for the same old powder keg.
Now, cutoff jeans is actually Emma Coburn's trademark style. Anyone familiar with her social media and with the coverage she gets on these boards would concur. I don't think there is another runner more associated with those fashionably faded and worn, lighter wash cut off jeans and her display of her uniquely muscular legs.
This polarity and hatred was so profound, I'm sure some posters early on were wearied by it and tried to steer the debate back to sane ground, things some folks can agree on. Emma is attractive, etc and in polite terms, I'd say. This would be the first three or four pages. I stopped keeping up with it after that. Now in my opinion this is pretty common at xc meets. Since the competitors are dressed skimpy, you see former athletes, veritable celebrities in the xc context, Also wearing this style. I personally think it's acceptable, but I understand the opposing viewpoint for marketing. Notice early on the debate wasn't even about appropriateness in terms of sexuality, decency, etc but about professionalism, marketing, etc. Like I said, some working folk were venting their rage that had nothing to do with sex or gender but everything to do with the political and cultural longtime charged landscape and their own misgivings about money, class, professionalism, etc. Anyone who has been on these boards the past three or so years see how much volcanic hatred just spews over such social powder keg angst and class consciousness.
Now I'm sure later on as the thread was getting huge the segment of the visitorship that is immature, lacking eloquence and infantile, teenage and young adult started to pour out their comments. The moderators should be responsible for culling some of those comments.
But, to the original anonymous complainant, I hope these alleviates some of your worry. I don't think it's as bad as you think.