you know what doesn't have much credibility? an entire racing series of totally stock looking cars. When is the last time you flipped on a race and saw people racing around in cars that are totally stock visually?? Aerodynamic mods are MUCH more than just rear spoilers and wings. They are entire aero packages. As well as doing things like replacing stock (heavy) body panels with carbon fiber parts to save weight.
frankly there are also plenty of body kits out there that just plain look better than stock. There are plenty of LEGIT visual modifications that are not "ricer" or "distasteful" in anyway.
Shoot, I'm all for visual mods/livery editing simply to allow people to express themselves however they see fit and stand out from the rest of the people. Who wants to jump into an online race with 6 other red Ferrari 458's and run around a track for a bunch of laps looking at the same car?? Talk about boring!
Part of the beauty and art of the automobile (and especially racing) is that your car can be YOUR canvas to express yourself in any way you see fit. Just like the clothes you wear, and the music you listen to.
At the end of the day the "ricer" and the "aficionado" are the same thing. They each share a deep seeded passion for cars, driving them, making them go faster, and looking good while doing it. Just because you disagree on style of modifications, or can't imagine putting neon lights, a big NOS sticker and an aluminum wing on on an Enzo does not make someone who does any less of a car guy...They simply have different tastes.
And anyone who is actually offended, or feels this is actually in some way a disgrace to some kind of car god....they need a reality check. Because this is a video game, and whatever some kid does to his Ferrari will in no way effect your life, or hurt your experience in ANY way...just pass him on the track and you will never have to see him again.