Yea i understand this one and it probably will happen at some point in time someplace..The first time a gun is taken from a teacher and used by a student everyone will be changing their tune on this subject.
I kinda like option 2 betterThe issue with that is theirs ways around lock systems. The best security systems in the world get hacked on a regular basis. All locks do is keep an honest person honest.
The only way to cure a psychopath that would shoot up a school or anywhere for that matter is with a lead injection. Preferably between the eyes but a full clip to center mass will do just as well.