I don't know if they always put them on but I bought the car in Ohio and of course don't need a front plate over here in NC. I hated how that big chunk of black plastic ruined the look of the front end. I suppose a body shop is an option but too expensive. There is also a site online that sells color matched bumper plugs but I think that would still run you around $60 for enough of them. So I said screw it and did it the cheap DIY way.
Can of spray paint from Auto Zone.
Two packs of plastic hole plugs from Lowes. Item #139447 (size 3/8ths)
Total cost around $10. Didn't take any pictures during the process but it was really easy. Drilled out the pop rivets or whatever the dealer used then painted the caps and they snapped right in. Perfect fit. Took no more than 30 minutes.