Riding in the City and using urban features is really popular these days. Many kids decide not to use a helmet. The professial urban riders don't seem to wear them in the videos. Not clear if a helmet would have helped anyhow. What I do know is that this is terrible and I do feel horrible for the kid. He will have somebody picking shit out of his ass for the rest of his life and that, my dear, is horrifying. So setting up a donation site is just fine in my books.
If he is paralized, I hope he gets some inspiration and the will to live from that snowboarder in Nelson who is a quad and better than 95% of snowboarders on this forum, including myself.