No way, plot a graph of average horsepower and top speeds over time and you'll see it going up and to the right.

If your point was that children should not wander along highways and race tracks I agree.

Your average driver drives way, way too fast on your average residential street and especially parking lots. I've noticed an uptick in the amount of times I've been illegally passed on residential streets in the last 10 years. My street is only around five-six small lot houses long and I'm almost impressed with how fast people manage to drive on it.

Of course, I'm not sure that it has much to do with the speed of the car they are driving.