I bet the thieves would still make a mess of your car trying to gank your deck, even if they couldn't get it out.. A car with no faceplate makes them not want to break-in in the first place and move on to the next one.. A lot of thieves will take their chances on an Eclipse not being activated, and if it is, so what? They toss it without a care because they haven't lost anything, but you have.. Park our two cars side by side, mine with the faceplate removed (err, my D300 doesn't have a removable face, but my new D310 does, FTW), and yours with your Eclipse, and see which one they pick 99 times out of 100, even with the ESN security stickers on your windows.. They aren't the brightest bunch, and they go for the easy scores.. Like I said, them stealing an Eclipse and finding out later that the ESN has been activated still doesn't cost them anything..