I would say that driving under the influence of ANYTHING should negate your car insurance. This includes the greeen. For sure. If your judgement is impaired or slowed and you cause an accident, why the heck should the insurance (eventually the rest of the peeps buying the insurance) people have to pay? Being fried does impare judegement. People are bad drivers as it is, why make it legal to add another negative aspect to their driving. Just because it doesn't "kill" as many people as another substance/action, does that mean its just brushed aside? LOL! That's not really wise.
Assault kills less people than murder, so should assault be legal?