You know what doesn't help people to drive safely? Distracting them by putting a huge
I'm not disputing that the responsibility to stay focused remains entirely with the driver. But if you want to put across an important message like this, you best use a means that doesn't directly undermine it. I've seen this same resident stick out a sign that says simply, "Drive Like Your Kids Live Here." That has the same positive effects without taking drivers' attention from where it should be - getting their vehicle through that curve without incident.
(UPDATE, September 6: Here's the dinosaur with the red backpack.)