Have you ever met the crew that posts on SnS?
Look, many of us have our eccentricities. But I don't know of anyone around here who has a huge munitions supply in the spare bedroom in order to secure his quarter acre perimeter in the inevitable event that he is attacked by Mexicans, Arabs, Mormons, aliens, Katrina evacuees, Kenyans or, quite possibly, all at the same time.
A couple of five gallon jugs of distilled water in the pantry strikes me as sensible. A box of live hand grenades strikes me as overkill.