Several US schools to install pepper-spraying drones to respond to school shootings
(www.theguardian.com)
No.
It won’t.
All pepper spray is, is an irritant. I personally train people on a monthly basis to work through it. I’ve personally seen people- including teenage kids- angry enough, or on something, or having just been exposed enough- that it does nothing.
Pepper spray isn’t a restraint, or an incapacitant. Its sole use is in pissing people off, breaking up drunken crowds, or harassing protestors.
Additionally, pepper spray is fundamentally designed to spread and contaminate everything in the vicinity- including those kids you care sooo much about.
You know what does stop gun violence? Gun control and mental health programs.