I think a lot of the confusion comes in because people don't understand what putting on a GTR (or Type R, or whatever) badge MEANS. It doesn't mean your car is capable of running x seconds down the quarter or doing a x:xx lap of QR, it doesn't mean it's as fast as or faster than a GTR. It means "this car is a GTR". If it didn't come out of the factory with a GTR build plate, then I'm sorry but it's not a GTR, and you're telling everyone your car is something it's not. Just because the performance may be equivalent is irrelevant - it's NOT a GTR unless that's how it left the factory, regardless of what mods you've done or how much GTR stuff you've bolted on.
Regardless, if someone wants to put a GTR badge on their car, who are we to tell them them they can't? It's their car, their money, and whatever they want to do with it is their business. I will still laugh though