I'm loathe to weigh in here - not least because women often don't report abuse because they don't think they will be believed, and when they do report it, they are often not believed. These are real problems, but,
The entire issue revolves really around one word: "grope". Take that out, and we have at most, an issue of rudeness (comments, taunting) and procedure (band location). "Grope" invokes sexual assault, and the schools are required by Title IX to investigate - otherwise they open up themselves to civil suit.
What's interesting about this case that we've yet to hear a first hand account. The Facebook post is from someone who did not, by her own account, get knocked down, get groped, etc. She was talking about other people. She was clearly upset about not getting to finish her routine. It is of course entirely possible she threw in "grope" as hyperbole in a moment of anger at getting interrupted.
It also can't be ignored that Boone is in a part of the country that, let's say, has had it's race issues in the past. The color guard - young white women. The football players - large black men. Men who ended up at least bumping into them. My high school's freshman team went to play a game in Erwin, TN - which is less than 60 miles from Boone. We were turned back and not allowed to play, because we had a black player on our team. And this was in 1985.
Add to this that the band leader had "warned" them that UM players do that sort of thing, and that UM players are "scum" (as if the band leader would have any basis for such an irresponsible claim), does call into question the Facebook post's veracity - which is at this stage the only evidence on offer.