It might be because I was only finishing elementary school around the time of the Columbine massacre, or that I now attend a school that had a shooting recently, but I've never thought it 'scandalous' that school buildings of all levels maintain a no guns, real or toy, rule. This case is obviously extreme. As is any case labeling a kindergarten girl a "terrorist threat", which luckily I've never seen in my country.
But I get being strict about it, because there are toy guns that look a hell of a lot more real. Fuck, I remember watching a video a while back of cops who couldn't identify a large number of the fakes from the real guns. This is purely a ridiculous exaggeration of the precaution. Although, and this is another matter all together, it baffles me why the parents are suing.