Again, when people point out being an emotional thinker who cannot listen to what people say without projecting and making shit up, this is a fine example.
If any one is getting boners in any dressing room that's not going to be tolerated or accepted. Doesn't matter if it's all men. There's no reason anyone should be treated to a different standard.
(I also think her build gives her an unfair advantage in competition against ciswomen, fwiw)
This is not a "trans" issue, again rape is a crime that should be prosecuted. Sadly it usually isn't. And if the school was involved in covering it up they should be sued (though reading between the lines of your account I am guessing the student just chose to transfer out or was expelled). This isn't a story about a trans woman getting special treatment, this is exactly what happens most of the time in these cases, sadly.
If you know 10 women, you probably know someone who was raped in high school, and odds are the perpetrator didn't face charges and odds are they did it again. And that is a huge problem and it needs to be addressed but it isn't gonna happen by trying to make believe this is a special problem of transwomen.
It disgusts me too, but the problem is that it either only or especially disgusts you when a trans person is involved. If you showed the same concern for all children who were victimized maybe we could have a sane conversation about how to help that situation overall instead of just a shrieking culture war.