It seems like people have this almost superstitious fear of rockfall at Vantage. It's as though they think that anywhere they stand, a rock can just magically come down and hit them in the head. Perhaps in rare cases that could happen, but it usually is triggered by climbers. What I have found is that if you pay attention to what you are doing and take note of where your climber is and where other climbers are you can belay in a place that is relatively safe. If there are climbers next to a route I am interested in, I usually won't climb it because it is difficult to deal with rockfall potential from two different sources.
Now kids are another thing. They are all over the place and they definitely don't have the presence of mind to stay away from dangerous positions. So no, I wouldn't take young children to Sunshine Wall, but I would take them to the Feathers.