What's the point in driving like a loon?
And being serious for a minute, its not about being a nutter.
Those more interested in mpg/do-gooding than anything else cause everything to else to come to a crawl, selfishly impacting everyone else's progress. Probably more-so than those constantly lane swerving, or the retards on the M40 who won't leave the outside lane until the cheverons start at the slip road they need to get off at, causing all lanes to have to come to a standstill.
In fact, one of the reasons for my previous poor economy was all the do-gooding tosspots driving so slow, making my 24 mile commute take over an hour, and my average speed over several tankfuls to drop below 30mph. My mpg has improved with the new commute, simply because being mostly dual carriageway/motorway, I can (eventually) get past these selfish, self-centred idiots (we all know the type - lane hoggers, those that take 10 miles in outside lane to overtake middle lane car, as they won't do more than 56mph for fear of not getting a gazillion mpg).
Line 'em up for the culling.
//TB goes off and breaths deeply