Ovr, we don't charge for re-etch.
Yes you can refuse it. Some do, but our penetration is over 80%. Just about everyone knows someone who's had a car stolen.
Some dealers 'pack' the etch in with the doc fee, in which case your choice is limited.
To add to sterling's comment about cost, yes it costs only $5 to have the lot tech put the #'s on, but the dealer pays the insurance co a premium as well, so It's not pure profit.
Like every product we offer, there is a value, it's up to the consumer to determine if that value is worth the sticker price. No snake oil or scams.