"Vision? What do you know about my vision? My vision would turn your world upside down, tear asunder your illusions, and send the sanctuary of your own ignorance crashing down around you. Now ask yourself, Are you ready to see that vision?"
-- Huey Freeman, The Boondocks
I love smart growth, but I hate the term. "Smart growth" refers to things like creating walkable neighborhoods, with a variety of housing and transportation options and a sense of place through compact building design, mixed land uses, and a collaborative planning process. The result is more preserved open space and development within existing communities (Guide to California Planning, p. 296).
The problem is calling it "smart". Because when you call your ideas "smart", you're calling the people who disagree with you dumb. Not only is that inaccurate (there are many intelligent proponents of classic sprawl), it pisses people off. Nobody likes to be called dumb. These disagreements are more about values than intelligence.
If you don't agree, you're stupid :) Stop saying "smart growth", and start talking about what it is.