My friends will call mine a Grand Am too. Drives me insane. And they know it. I drive a girl home daily and one day we walked into the parking lot after school and shes like, "OMG that car looks like yours!" refering to the silver grand am next to me. I went on a 5 minute spele about how the cars were different with appearence and engines and such and the look she gave me was so priceless. haha. We proceeded to get into my car to leave and low and behold, the owner of the Grand Am had been standing there watching me go off. I bet she learned something about her Grand Am that day.
And anyway as far as the badges go... I left them on for a while because I kinda liked them. It started to bother me because it is the same color as the car so you couldnt even read what they said. So i took them off and ran around without them for a while. Then I got this stellar idea to paint them silver and put the GT up in front of the door similar to how the Mustang GTs have theirs just for funzies. Recently I added the Cutlass Cruizer badges from my old station wagon that got crushed (RIP) so now its a Cutlass Cruizer GT. Lame I know but i figured why not. The badges are super easy to take on and off anyway.
IF I had a GTP I would leave them on there because a lot of people give me crap for not getting the GTP and honestly I considered just slapping on GTP badges so they would just shut up. But I figured if I did that everybody would wanna race me and Im not really into that much.
Just my thoughts on this sorta thing. Im rather neutral on keepin badges or debaging as you can probly tell.