Can of worms.
It's up to you to determine whether or not the laws of society, and the enforcement thereof, are just and moral or arbitrary.
Me. I go with what's appropriate and safe for the driving conditions at hand; if everyone's doing 10 over the limit in heavy conditions and you're doing the speed limit, you're a road hazard, and not righteous.
If it's snowing hard in heavy traffic and you're trying to do the limit while everyone else is 10 under, you're not righteous.