School Zone Gun Ban-An unintended problem?

Federal law prohibits firearms within 1000 feet of a school. You may own a firearm, but may not transport it from your house to your car if you live within the zone according to those now discussing it. I suppose this means that if you are going hunting or to a firing range and happen to drive within 1000 feet of a school, you are violating federal law. I hadn't thought of this. I wonder if the feds have ever decided to enforce this law? Is this concern an unintended consequence? Sounds like another reason to have a CCW so you will not inadvertantly violate some law.