There's a nuance here: non-SpaceX rocket *first*-stages typically fall into the ocean, but they do that within controlled exclusion zones, which are notified an

There's a nuance here: non-SpaceX rocket *first*-stages typically fall into the ocean, but they do that within controlled exclusion zones, which are notified and restricted for air- and marine- traffic. *Upper*-stages are a different beast. Most (see my sibling comment) deorbit uncontrollably and impact somewhere at random.