I live in a rural county. That means too many dirt roads and too few cops to catch much, regardless of what is posted... I tell my city-born kids there is a reason a lot of NASCAR drivers were good old boys from the country.
My best friend takes it as a sworn duty to drive 4 mph over any posted highway speed limit - she says the police won't bother with highway drivers for so little. And that she has too little time/inclination/patience to mess about with stupid speed limits. She would go higher, but she really hates separating herself from her money (speeding ticket) more than obeying a speed limit, so speed limit it is. Sort of.
I have a mantra that I have spouted for years... "If I eat right, I feel right. If I feel right, I exercise right. If I exercise right, I think right. If I think right, I eat right..." Phil-SC