Somethings I think people are are overly defensive oriented. I read a lot of posts along the lines of
"SA failed me - Girl scout walked right up behind and offered cookies - what if it had been a thief with a knife!!!??" or
"Almost drew on water meter reader!"
"Dog barked at night and I unlocked my 1911 - turned out dog just had to go outside and pee!"
A defensive mindset doesn't mean thinking that everyone that surprises you is trying to rob or kill you.