I am not concerned about dogs that are barking. I am concerned about the ones that are just growling...those are the "biters", lol.
Dogs bark to issue a warning or at things that scare them. Humans are similar. I seldom worry about suspect #3 in your "lineup". As a general rule...the louder a person yells, the less chance there is of him taking any action. The louder a person gets in an argument, the smaller the intelligence becomes...lol
The only important questions in life are those that you ask yourself. The only person you have to prove anything to is yourself. There is no law requiring citizens to respond to ignorance, lol. You only have to endure it for a few seconds...he has to live with himself for a lifetime...lol.
Life is too short to worry about those with dysfunctional social skills trying to ruin your day.
