There are alot of people I know that NEED to have a big vehicle.
My sister upgraded from a 9-passenger Suburban several years ago, and just upgraded from a 12-passenger to a 15-passenger van.
They haul their trailer all over with it, have 4 kids, and do alot of activities with the Jr. High group at their church.
Have you ever tried to take Mom, Dad, Grandpa, Grandma, 4 kids, 4 of their friends, and an Aunt and Uncle somewhere in a Civic?
You'd need FOUR Civics to do it.
Even at 40 MPG, you'd be using MORE gas, creating several times more pollution, taking up FOUR TIMES the parking spaces, and creating more traffic.