While the drones are armed, they use non-lethal or less-lethal weaponry, allowing them to distract, disorient, confront, degrade, and incapacitate shooters, according to the company. They carry pepper rounds and a glass breaker for quickly entering classrooms.

Despite not carrying lethal firepower, having 30 to 90 of these drones in schools has raised concerns. Beyond any potential technical issues, there's always the possibility they could make a shooting situation even worse or more complicated. There are question marks over the kind of training the operators receive, too. Then there's the storage safety aspect, as well as the potential of a drone colliding with a student or law enforcement as it zooms through corridors at 50mph.

We'll find out how successful the system is soon enough. Campus Guardian Angel aims to install the drones in the schools permanently in September and October, ahead of the fully operational live service starting in January.