Thanks for all your answers, good points have been made. I have to say though, I've lived and driven a lot in big cities like London and Paris - these are even more congested than Auckland and you seldom see this sort of behaviour - people have to drive rationally, admittedly quite aggressively at times, but on the whole road users are predictable and follow an unspoken road ethic. I'm not a slow driver, I actually meant when in congested traffic and you have nowhere else to go as you're behind the car in front and then some lunatic crams up behind your rear bumper. I guess I'm extra protective of my car as it usually contains my kids.
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