Sorry to sound cynical, but waiting until a crisis to arm oneself is a bad idea. Without training, mindset, and preparation, the gun will be a liability.
Those folks don't need to come beating on my door at such a time, saying "I see your point! Loan me one of yours!" Panicky, unprepared, and untrained people are the last folks on earth I want handling firearms.
Very well said.
Although it might seem a bit selfish to some, there is also an economic factor to consider; folks like that essentially want us to foot the bill for their self defense, by having "extra" guns and ammo on hand to loan them.