Feel good about yourself right? That's her choice to drive her family in, not yours. I can't stand smug people. I have no need for gas guzzler to haul kids and material around, but if I did I have the personal liberty to make that purchase. Kinda like apple products, the more choices and configurations that there are, the more ideal they become for the many different types of consumers.
Your point would be valid IF SHE HAD A FAMILY TO HAUL AROUND ANYMORE.
Both her children have their own vehicles and they no longer take long family vacations in the car anymore.
The wasting of a finite resource and pollution put out by a vehicle that large to drive 3 miles to and from the grocery store has no justification.
And yes, I do feel good about myself. I drive a vehicle that gets 95+ mpg.