When all that's in between my family and a criminal with a weapon is me; you're God damn right I'm an another idiot with a gun. A tempered and responsible gun owner; but still 'another idiot' with a gun. I have been a law enforcement officer. I can tell you with full confidence. In times like these, don't depend on a speedy response time re calls for service. There is nothing wrong with being prepared to defend your family with lethal force should the need arise. If you don't think that would ever be necessary, I'd suggest you reevaluate your surroundings and read up on your history. That's not a scare tactic. It's a possibility. What was once called the Boy Scouts had a motto for that.....
Having said that, in my travels most people, in passing, have been more polite than in the past.