That's fuckin cool dude! It's gotta be a bitch to see out the back windscreen, but cool nonetheless. If I see your car in Auckland I'll know who it is - EDIT: for some reason I read "Auckland" for your location.. ?? so that's what that was about. Hell, I was just in Chch a couple of days ago.
Becasute of view from a car. I saw some "metal cars" here, but you would probably pay a fine for that (when my father has one tag on a car long time ago, he had to take it over and pay fine).