The fake face plate would be for theft prevention. Some people with double din nav units have made a faux radio cover from an old stock radio to cover their nav screens to prevent theft when they park their cars. I've seen them made for hondas and nissans, but I never seen one made for a ls. I think they can be bought on eBay. However the premanufactured one would probably look too fake since the ls radio's area is flat.