Maybe you should have read OP's comment until the end before posting your angry reply. He said, that if laws were perfectly enforced, it would basically mean that the set of laws would very quickly be trimmed down to the set of useful laws. In the examples you cite, pot would become legal, and we would get better traffic laws (i.e. "contextual" speeding laws, only when children are present on the pavement/only when the visibility is low).
I did read until the end. I quoted the end. He then added a second paragraph that is more reasonable.
In his initial post, Op didn't ask for 100% enforcement so that we would then get sane laws, he called for 100% enforcement because children are dying.
I do agree that full enforcement would likely lead to vey quick changes in the law.
