I confess to being puzzled as to why so much stick is reserved for "middle lane hoggers" I drive on motorways a fair bit and can honestly say I don't see that many, and the majority I do see tend to be on quiet stretchees of the motorway where, admittedly, it is daft to be driving in the middle lane, but where they are easily negotiated.
On the other hand I see people hogging the outside lane, bumper to bumper, at high speed, often when there is ample room to drive in either of the two other lanes. Such driving is not as stupid looking, but it's far more dangerous as a rule.