We have no car.
Everyday life presents us with many more likely risks than these sorts of remote tragedies. For instance, a few weeks ago, I was chased and threatened with bodily harm by a mentally unstable homeless man (thankfully without DS), in a safe and affluent part of town. That incident was idiosyncratic and is unlikely to change how I behave in my neighbourhood, though it was truly distressing at the time.
Also, people are known to have poor risk perception of remote events...hence the hyperbolic response by trolls on the news websites.
