Hello tcarlisle, 
From an experienced mapper like yourself, I would expect to see a more thoughtful and welcoming approach to judging a new mapper's first changes made to OSM. While I am sure there are mistakes made, it is obvious that this person has made a serious effort to add useful information to the map, and it seems clear that they spent quite a bit of time on this particular changeset. By dismissing all these changes without any comment or guidance, you have accomplished two things:
1. This mapper is unlikely to continue to contribute to OSM, and we are losing their unique knowledge and perspective  they might otherwise contribute to what is our collaborative map.
2. The potentially useful parts of this new mappers efforts are now lost to all of us.
As the organizer of the OSM Utah meetups, I care about welcoming new mappers to our community, and it is actions like these that make my work all that much harder. I would love it if you would consider what impact your actions have on people taking their first steps contributing to OSM. Perhaps you can reach out to this mapper and explain what you think they did wrong and how they may contribute their knowledge instead? I have no particular knowledge of backcountry skiing nor the tagging involved, but I am sure there is a way to capture this data on our map. 
Also, please consider joining our meetups sometime, we are at osmutah.org and meet on the first Tuesday of the month in Salt Lake City. We would love to welcome you there.