I can see the safety hazard of going 50mph in a 65mph zone if there are people whizzing past going 70+ durring rush hour. as ive started hypermiling ive thought to my self if driving to slow is a reasonable reason to get pulled over. of course i just find myself accellerating as slow as i can, but i still try to go around the speed limit. if there wasn't anyone around or no heavy traffic i would be aggrivated myself to get pulled over.