In one story a five year old girl was suspended from school for 10 days for offering to shoot a playmate with a "Hello Kitty" bubble blower gun. In another story in two separate incidents, six year old boys were suspended from school for pointing their fingers like guns.
Nor are these incidents isolated. I know personally of a cub scout who was suspended from school because he left his cub scout pocket knife at a friend's house, and the friend returned it to him the next day after school, and another student witnessed the exchange.
In none of these incidents were any students "in danger" and claims that we need to take these or any additional actions to keep students safe is absurd. Does any one honestly think that a disturbed person, intent on killing as many people as he can, will change his mind because he can't use a particular type of weapon? If they do they are delusional.
There are non-assault rifles, hand guns, pipe bombs, knives, Molotov cocktails and I'm sure dozens of weapons I've not even considered that can be used to attack defenseless people. Note that the key word is "defenseless" people. There will always be someone who goes off the rails. As long as we make people more defenseless, there will be more devastating attacks.
The question is, do we want to make people really safe, or give them the fantasy of thinking they are safe?