> States are quick to hold bartenders, servers, and owners liable for
> tragedies such as this. What I don't see them doing is mandating that
> automobile manufacturers equip all cars with breathlizer ignition
> systems.
Its interesting that you bring that up as recently here in Canada the police
have begun testing a system just as the one you described to install on the
cars of repeat drunk driving offenders. The devices are designed so that you
have to hum into it with a certain tone while you exhale, something which is
not easy to do. The car owner is taught how to do it by the police so they
are the only ones able to use the breathalyser to unlock their ignition.