I think that is much more damaging than one person getting 4 kids dead, as much as this is already a tragedy.
Going with this reasoning people should be banned from using cars at all, because, frankly, I see a huge number of people driving completely irresponsibly and not thinking a whole lot about it until an accident happens.
Do we really want to live in a world where it is not possible to behave irresponsibly because all options were taken off the table?