I got pulled in a car some years back on the M1, was well over 120 (believe it or not) but summons said 100, guess the traffic guys thought it would be enough for me to get well chopped. Went to court having pleaded guilty, took the (then) wife along and stuck her wailing at the back with my baby son. It was a lady magistrate and I got away with a fine, a few points and that was that on the true grounds that I'd done nothing dangerous and hadn't caused an accident, also that losing my licence would not just affect me but my family as I'd lose my job.
When taken by the usher to pay the fine I asked if she thought it had been worth going to court, she reckoned I'd have got a ban for sure if I hadn't.
Basically the whole speed issue is bollox, it isn't the real killer, we all know that but it's an easy target. Whatever you have to do to beat the system go ahead and don't worry about the morals, the legal system has little regard for morality or justice.