The founding fathers allowed us to own guns to resist a tyrannical government, like the many kings of the age. It was a lot more likely for your government to up and say "hey, you forgeters are slaves now" than it is today. I'd personally blame our problems on our increasingly violent society. Our country has nothing going for it and the American Dream is falling apart fast.
Good point.
I know in my school, my Geology teacher has a different policy.
See, at my school, the Geology teacher is awesome. He turned "rocks for jocks" into a "Get out there and smash stuff to find out what's inside while still learning" class. He has about twenty-five rock hammers.
The idea is to perch next to the door during a lockdown with a big metal rock hammer or two ready to drop on an unsuspecting gunman's head.
We never have school shootings in our area so it's a moot point, but still, it's almost amusing to imagine.