That's great for you, but I don't get pulled over. My neighborhood has people walking the streets looking for reasons to put tickets on cars. The first one, 2 years ago, was because some jerk knocked it off when they hit my bumper. That worked to get me out of that one. When I got another last fall, when again some clown knocked off the temporary setup I had rigged that I hadn't put back together yet, they had notes in the computer about using the same excuse. Even though it was true, I still got the fine ($50). I just got another. Since it's the same plates as my L, I'm not even going to bother fighting it. AND THAT'S BEER MONEY!
The stickers won't work for the same reason. They walk right up to the car and inspect it basically. No city sticker, no front plate, for sale sign in the window, tints, etc., all will get you tickets. They err on the side of writing it because most people won't bother contesting it. Cha-ching.