Yeah, I've noticed that at least around here the biggest tantrums come from the adults. Before anyone gets a chance to call me on it, yes I know that I throw a pretty good tantrum myself when I feel the need
The downside with the juniors, as is the case in most sports I'm afraid, is usually the fencing parents. I'll say most of the regulars around are club are very nice and a great help in keeping their children in line as well as helping to keep the club running, but every so often there's one you just want to take out and beat severely.