Well, I hate to tell everyone, but I "ruined" a perfectly good trunk lid so I could put my "Camaro" spoiler on!
What can I say? I've had 5 Firebirds over the years and 4 of them had the rear spoiler, including my first one. I've always liked the way the car looks with one, even more than the TA spoiler.
I put it in the category of "making the car the way I like!"