Ever notice they all seem to come back with the same lame arguments about "criminals"? Don't they ever stop to think that in the eyes of some politicians, simple firearms ownership is enough of a "criminal offense" for them.
In these catastrophic situations civil authority breaks down and self reliance becomes the order. Amongst normal people, this usually works for most everyone, as best can be expected.
There are, however, on occasion, individuals, in these situations, who think that because they are armed, they are entitled to intimidate. They are more dangerous than the criminals and should be disarmed or fragged.