They're still quite rare in the Columbus, OH area in my experience.
I got quite a few stares when I parked in the 'eco' spots at IKEA in Cincinnatti, OH a couple months ago though. The spots are marked for hybrids, electrics and diesels
My EcoDiesel badge wasn't sealed properly and moisture was corroding the badge from the inside. When the dealer replaced it under warranty I had them just not put it back on.
I don't care if people think I'm a tree hugger, they just started my de-badging process for me
PS. I know I need to update my name on here since I got the beauty.
'14 Brilliant Black, CRD, Tech, ORAII