Speeding laws and their enforcement are corrosive to our sense of justice. Think of it as a gateway law to break.
Drive the speed limit and you get angry people tailgating you and angrily making unsafe passes even when you are in the slow lane. Clearly in most places the speed limits are too low. So most folks in decent highway conditions drive 10-15 mph over the limit, which makes them all law breakers.
Cops don't clearly state at what point they will pull someone over, or what cup size allows you to talk your way out of a ticket, which really erodes our sense of equal justice for all (and violates our constitutionally guaranteed right to equal protection under the law). In fact we all violate the law several times a day just to live like a normal citizens, and much of the time we are pretty unaware something was even against the law (a sure sign our legal system has gotten out of hand). Cops get to choose when to apply esoteric laws and when to ignore pretty basic ones (depends highly on skin color or the presence of a badge).