There's a lot of people who think SUVs are the root of all evil based on their economy....At least a full size SUV has a lot of usefulness. How much can you haul/tow with a car?
Only ignorant people think SUV's and trucks are the root of all evil - we need them to run our economy, from work sites to construction, moving things, etc. If anything, the manufacturers and oil companies are the ones to blame for our massive dependency on oil, which is the real root of the problem, not people choosing luxurious, excessive vehicles.
That being said, what pisses me off is the Lincoln LT in the fast lane, bullying everyone else off the road because he has a beef with the world and thinks because he's bigger he owns the lane. It is not inherent in all big SUV/Truck buyers, but the few people that buy it to make up for social inadequacies seem to demonstrate this behaviour - it's the ones on 24" chromes with low-profile tires that have never seen a dusty road. I don't judge everyone based on this stigma, but it's difficult when the stereotype keeps getting repeated - I'm bigger, get out of my way.
As far as the performance cars go, you're a bit off there. A Porsche Turbo is a marvel of engineering, it actually achieves 8.3L/100 Kms highway, all while having the power to pretty much outrun anything else on the road. But you know what? I don't often see a Turbo flashing his highbeams at me in the middle lane, tailgating on a winter morning or cutting into my lane because he's bigger. If anything, drivers of exotic and luxury cars seem to have more respect for fellow motorists (except 7-series drivers - they're all dbags, sorry) and that earns my respect in return. Besides, the Porsche is dong what it does best - blast along smooth roads - what's the point of driving a vehicle built for muddy/rocky terrain on a highway? That's like buying a pair of scissors to shave your facial hair...not what it was meant to do.
If you're a normal dude driving your SUV cause you tow a trailer or go to the cottage, and have the courtesy to respect me as you would any other motorist, that's cool. If you got picked on in college and have a bad marriage so you buy a dually to make up for it and take out your frustrations on the rest of the motoring world, that's not cool.
My two cents...