Used to be you never tangled with a sales rep as they are the most stressed, but no it seems granddad and his micra are trouble
Personally I think it is down to how mean you look, the meaner you look the quicker the fookin metalist seems to accpet the appology or drop their aggression
My sisters fella is a harsh bloke, he gets very little bother, infact, very often my sister will tell me about peeps giving her shit for nothing on the road until he gets out of the car, then they seem to sink into their seat and express the lack of need for violence