This unwritten distinction exists only to allow targeted enforcement in service of harassment and oppression. There is no upside (even if getting away with speeding feels good). We should strive to enforce all laws 100% of the time as that is the only fair option.
If a law being enforced 100% of the time causes problems then rethink the law (i.e. raise the speed limit, or design the road slower).
If a law being enforced 100% of the time causes problems then rethink the law (i.e. raise the speed limit, or design the road slower).