The stress factor alone could make them snap.
If we don't have any system in place in our society that can identify and intervene on people off their rocker enough to go on a rampage... then we equally do not have the capacity to be confident in handing out guns to students, janitors and school employees on the blind assumption that they won't snap one day.
One teacher leaves it in an unlocked drawer, a purse, etc. and someday that one kid who couldn't get a gun grabs it while the teacher's not looking.
So yea, give the janitor a gun, he seems like a nice chap, then tick tick tick, only a matter of time before a janitor somewhere with a hinge loose...
who the hell would wanted the janitor of their school carrying a weapon on them?
I'm thinking do these janitors get a background check? One for firearms abuse not child abuse.
This will create nothing but a police state..