We had a discussion about this in one of my grad school classes actually, and most people seem to agree the problem with the situation is less the situation itself and more what is going on in general.
The way society is, many children are being treated as "everyone can be special at everything!" and it leads to situations like the above where in a Sports Team wins by a huge amount and some people overreact. Many of us, especially those who were in sports, all pretty much agreed "Sports is a good thing because it teaches you, in a competitive but still friendly environment, that things don't always go your way, losing happens, and sometimes it is big." It where there is little at stake, and even children understand that much. Yeah, losing is a bummer, but when they wake up the next morning, they've gotten over it (there are exceptions of course, but that's the case with everything.)
The problem is that the parents want "What is best" for the children, not realizing that making a fuss over the incident is way worse than shrugging and moving on. If it happens once, it happens, everyone moves on. And these were High Schoolers too; they are fully aware of this kind of stuff. A loss sucks, but you get over it, and losing badly is one way that makes you go "we gotta get better." Making a fuss about something like this is exactly the way you WON'T forget about it in a bad way, and attacking the wrong points.
