Well, you are missing my point but here it is again. If you want to drive 100 on my street, there's nothing stopping you. 99% of people would slow down in a residential area because it is common sense. The other 1% doesn't care, regardless of the law. If the speed limits worked as you say then nobody would ever speed, right? Do you believe that fear of paying a fine keeps everyone in line? In actuality we all comply voluntarily, not under duress.