i dunno about that. if i was a salesman, and a saw a car enthusiast, i'd go out of my way to impress him. when you are looking for a new car, you'll remember him cause he gave you respect, and when all your friends go to you, the car guy, asking for advice, maybe you'll drop the guy's name, he seemed nice enough, right?
like someone else mentioned earlier in this post, don't underestimate word of mouth advertising. one good recomendation from a friend is worth all the billboards in the world.
