I dont think he should be banned or given a time out lol. He feels the car is not accurate and that is fine to have his own opinion. Just be nicer about expressing it, thats all.
Also, if you have a problem with a specific area of the car, why dont you say what it is, or show pics of how it should be? To knock the whole car without any real specifics just makes you look childish, and doesnt help your point.
I love the car. I'm tossing around the idea of selling mine so I can build it!