What your saying is exactly what I said. You won't see it coming. Your dog's perceived demeanor may not even factor into it. Maybe nothing will happen, but if something does, you'll just be another confused guy saying "but he was always so sweet...". You'll probably tell the same story then too, about how everyone was able to pet it while you were walking it. It means nothing.
True a dog could snap, but then so could any random person you see on the street. Do you live in constant apprehension and mistrust of every other human being you interact with?
Considering how many dogs have been owned as pets and the relatively small percentage that have been involved in attacks, it seems like a safe decision to own a dog.
