Would you trust 13 year old tires?

It has always amazed me how much time and money people put into their cars, but the only thing connecting their pride and joy ( some would also say bank account ) to the road is 4 very small contact point called tires. if you actually measure the patch of tire that actually touches the road and figure in the horsepower, turning g's and braking acting on it as you drive hopefully the light will come on that they are actually the most important thing on your car.