Wow, that's rude. I work as a computer tech so I get some extremely ignorant questions sometimes but I would never laugh at them to their face for it.
Wasn't nearly as bad, but when I first talked to a manufacturer with my fairly crude SketchUp model I definitely felt like an amateur way out of his league.
Well, I sent my design to like 200 people when I was looking for a manufacturer, so 1/200 isn't that bad.