I think it's cool either way, since I have a US spec car I'm keeping it original and keeping the 370z emblem on there, if I bought and imported JDM car with LH drive I would definitely keep the Fairlady badge on it.
As the original poster said, it's just his opinion and I can respect that, everyone on this forum does something to make the car more of what they like, if people were concerned about keeping the car to it's original heritage, they would keep everything stock. Look how many people take off the "Nissan" hamburger to replace it with a "Z" logo, why? 2 reasons, the Z logo looks better IMO, and the "Z" logo has more prestige then the "Nissan" one. I don't think it's all that great of a name either, but like I said, if it was on the car, I would keep it. Of course if it was called the happy lady "GayLady" then I might have to take it off.