That gets on my nerves. I couldn't afford the fine (and, as a 23-year-old male, a hike in the already punitive insurance premium) if I was to be caught speeding.
But driving at 70 on a busy motorway is quite difficult - the slow lane is full of trucks crawling along at 55-60 and both other lanes tend to move along at 80 or so. Going at 70 in the middle lane leaves you open to being cast as one of those annoying middle lane hoggers, so I tend to end up having to keep changing lanes, which is surely more dangerous...
But driving at 70 on a busy motorway is quite difficult - the slow lane is full of trucks crawling along at 55-60 and both other lanes tend to move along at 80 or so. Going at 70 in the middle lane leaves you open to being cast as one of those annoying middle lane hoggers, so I tend to end up having to keep changing lanes, which is surely more dangerous...