I just waited for the representative to pick up, and told them I don't have a car. It might be a coincidence, but I haven't gotten a single call since, and that was three months ago.
If you don't like this policy, please send a complaint to corporate. The employee isn't just doing it to be an annoying asshole, they're doing it to keep their job. Their continued employment depends on them asking everyone that enters the store if they want to preorder something. If their quota of preorders and warranties isn't up to snuff, they're fired. And don't complain to the person at the register, or even the manager, because they can't do anything about it. It's just their job. I still don't understand why people get mad at the sales associate when their trades aren't worth that much, or they ask them to preorder. It may be annoying, but they have no control over it. Please save your complaints about corporate wide policy for corporate. We (the register monkeys) aren't all bad people. We're just following bad (from the customer viewpoint) corporate policy. On the other hand, if an employee's being a fanboi, or just being a general unknowledgeable jerk, then feel free to complain to the manager. That's a local problem, with a local solution.