Earlier quoted context omitted.
You're basically saying that everyone should defect because everyone else does. So, there are three speeds we need to be concerned with here: 1. Design speed -- this is the speed anticipated and planned for by the engineers who designed the road. It's visible in features like curves, merging areas and so on. 2. Operating speed -- this is the actual speed of traffic on the road once built, and typically is measured as…
You realize that "politics" only works because drivers drive like idiots and generally ignore speed limits? If they were responsible, the operating speed would always be less or equal than speed limit.
And, again: the safest thing is to keep to the average speed of surrounding traffic. If you deliberately operate your vehicle at a significantly different speed than surrounding traffic, you are deliberately creating a hazard to yourself and others.