So why doesn't the car in the way move over ?
Aggression.
More specifically, passive-aggression ... or aggression for the spineless and lazy - certainly in the case of anti-social lane-hogging (which should get 3 points).
Someone once said 'There's only one thing that really spoils driving - and that's other drivers'.
Everybody hates a slow driver - and nobody likes being tail-gated.
If you find yourself routinely being tail-gated, honked from behind and overtaken, then you can ignore what follows and think about retiring from the road.
But for those who aren't passive-aggressive lane-hogs and queue-headers, then the following may be of assistance.
If you're being tail-gated despite driving at a reasonable lick yourself, simply indicate right.
The gator will generally back off in anticipation of seeing brake lights.
Of course, this is of limited use if you're in the outside lane of the motorway - but on a regular road, it nearly always works and continues to work because he thinks you're continuing to look for a right turn.
If you're being obstructed by Mr. Angry in the daytime, keep a safe distance (to disguise your intentions) and when the opportunity presents itself, use the advantage of surprise to overtake.
If you're being obstructed by Mr. Angry at night, pretend you're an unmarked police-car by rhythmically double-flashing your headlights. He'll sh*t his load and pull over, clearing the way for you to effect the intended passing maneouvre.
Job done!