Much of the problem of motorway middle-lane hogging is down to the "fast lane" misconception - there is no "fast-lane" on a motorway, just a normal lane (inside) and two (or however many) overtaking lanes.
I've even heard the term used on the media - stupidly irresponsible (almost as irresponsible as the boys-with-toys programme Top Gear, but then, Jeremy Clarkson might have had to go and find a proper job without it)
Jim Carroll