Why do people want a livery editor. 1,000 cars with a dozen different colors each. Is that not enough variety?
Let's uphold the sanctity of cars.
Why even have true to life color variations for cars if you can just paint any of them a hot pink?
Forza 3 is a classless game that lets you do classless things like like rewind the game or desecrate fabulous Ferraris and Lamborghini with tasteless designs and images.
To me, personally, the bad that can and has resulted from including a livery editor far outweighs the good a livery editor can be used for, as in team recognition for private online league races.
If GT5 was a racing game that was series specific to lets say V8 Super Cars then a a livery editor wouldn't be such a bad thing because all the cars in the games are racecars and they all have sponsors, images and logos on them. There's also only a small amount of cars to choose from as well so there isn't that much variety. Gran Turismo is a totally different story.