Kosovo would be perfectly stable without the NATO intervention.
My thought on the "bulletproof" backpacks...if you hypothetically were in an active shooter scenario, you could hole up in a room and bench your handgun on the backpack and cover the door. That way you'd have some support but also a certain amount of ballistic protection.
Not sure if it's useful for kids but maybe could be used by a trained adult.
How many guns does a chap need?
A shot gun/pistol for home/self defence
A bolt action hunting rifle
Does a patriot need more than that?
MHO is that a RESPONSIBLE gun owner should at least have a 12gauge shotgun for versatility of use and availability of ammo. Even if it's purley a defensive totem that never gets used outside of the practice range.
Different machines have different pros/cons and capabilities. So to be "ready for anything" you may need a variety. You may also want redundancies for un-armed family members in case of extreme civil emergency. (See hurricane Katrina, or L.A. riots)
Usual kit would be a long gun and a handgun for backup. So two for each member of your "posse".
You will also need a LOT of ammo to practice up with for each person. So contrary to "bulk ammo purchases" being a red flag, they are actually neccesary if you want to have any sort of skill with your hardware. (maintaining said skill is part of your responsibility as a gun owner.)
Does that asnwer your question?