Not one person involved in this had the brains to consult with somebody to see if this was allowed?
In their defense they were implementing state guidelines regarding active shooter situations, where even makeshift, ad-hoc barricading was advocated. They are now awaiting clarification from the state committee who issued the guidelines/training (excerpt below), before determining how to proceed.
Relying on lockdown alone will significantly endanger occupants in a violent intruder situation. ALICE trainers instruct on practical techniques for how to better barricade a room, what to do with mobile and electronic devices, how and when to communicate with police.
And from a recent state sponsored ALICE training exercise in Ohio:
In the second scenario, participants were instructed to barricade themselves behind a classroom door and find anything they could to throw at the shooter. This time, the staff members grabbed belts and wrapped them around the door handle and shoved tables and chairs up against the door. When the gunman tried to come in during the second scenario, he was not able to get to any of the participants
You said,
Sorry but the chance of this device being used at the wrong time are far greater than it being used at the right time.
which I think is certainly true if the educators are not trained on its deployment or the device itself is not kept secure from troublemakers and punks, myself included. ;)
Curious if you are pro-gun or not, since you often hear the same argument about household guns, that they are also far more likely to be used at the wrong time than at the right time.