The "just say no" campaign at this point is a lot like drawing sea-monsters over certain unexplored areas of the map and expecting people to stay away. It may work for some, but explorers live for this kind of thing.
I believe in intelligence, and I believe also that there are inherited differences in intellectual ability, but I do not believe that intelligence is a simple scalar endowment that can be quanitified by attaching a single figure to it—an I. Q. or the like.