What if 13 kids were killed on a bus because one kid wrestled the driver out of his chair, and rolled the bus? I think that is a more apt anology as these kids broke several laws in colorado to get the guns in school. Two kids can easially wrestle most bus drivers down, and once the kid gets the bus moving the rightful driver will have no correct way to get back in control, wresteling the kid out risks the same thing the kid did, and letting the kid say does the same.
As for fear, I do not own a gun because I'm afraid, I own a gun because I enjoy a weekend hunting, and the DNR enjoys me paying to help them control populations so that they don't have to hire hunters to control excess animoles.