Too bad the AI doesn't clamp down on it. The human can make one guy react to it, the other 10 don't.
EA really needs to smarten up the AI-controlled players when it comes to seeing stuff like this. Even if it's as cheap as doing it "Tecmo style" and having the defense get pumped up if the offense calls the same play too many times out of the last 10 plays. Likewise for the offense vs defenses that do the same thing.