“Green” Bullshit Comes To A Parking Lot Near You

Has anyone ever seen those parking spaces in front of stores such as Best Buy (among others) that are marked and reserved for “fuel-efficient” vehicles? I would like to know who decides which vehicles are fuel-efficient and which are not. Furthermore, I would like to know if meter-maids of sorts are sent out with MPG guidebooks, to issue tickets to (or worse, tow away the gas-guzzling vehicles of) assholes who park their Hummers and over-sized pickups in these spots. This has to be a joke, right?