I've been more around looking at the idea of creating high quality "T E S L A" badges / emblems for the Roadster. The earlier engineering prototypes and possibly sigs had decals and they didn't look all that bad. I actually prefer the look really. Pic at bottom. Take noticed of the old style tail-lights.
Personally I hate the plastic emblems and it does not reflect a $100k plus car that's a true automotive icon.
With decals you can change it up whenever you like and cater to your style. Lastly you don't have to be so delicate around the rear emblems while washing the Roadster. I might have managed to pull off a letter as well as Tesla.
Also with the decals, you can carefully measure where the original ones are, documenting it, and remove them. Then if you ever want to bring it back to stock you can and the letters will be preserved and most likely not lost.
I know that once you remove the Tesla badging from the rear the "mass" of people who admire the car won't know what type of car it is (as Nigel indicated happens with the badging). Also you'll get more people incorrectly labeling the Roadster as a "Lotus" production car which we all know its not.