[Restorer]

I disagree. There are quite a number of other weapons, notably a submachinegun or automatic shotgun, that would work at least equally well in these circumstances.

Unfortunately, all other such weapons are a little impractical to haul around all the time. :)

[nygoose]

Try walking into a Walgreens carrying a legal loaded shotgun openly.

[RKV]

Yep. This would do the job and be quite portable, too.