I can just recall those "air raid wardens". I doubt they were even worried about our country being bombed...especially out in the sticks where I live(d). I recall my father-in-law telling how he was threatened with a fine and/or imprisonment for smoking a cigarette in his back yard. He then lived in a small farming community (about 200 pop.) at least 50 miles from anything resembling a small city. The only "industry" was a sawmill where he worked, about 4 miles from his house..
Frankly; I think it was only a device to get everyone aware and involved!
For a potential BHO pattern, we should look at the "militias" of African would-be nations and their militias. After all, he is of African heritage and he wrote his books praising his African father & roots..not his American mother.
Perhaps for a logical pattern we should look at militias such as we have recently seen in Somalia, Rwanda etc., perhaps evenm Indonesia, where he spent his early years. You can look those up in Wikipedia or just Google them..