We had one doofus in the MG club that complained about over heating. We told him to remove all the useless garbage he had stuck on the badge bar and see what happened. No more overheating.
It looked like Dave's picture but worse and had a grille that was about 1/3 the size in the picture, so no rocket scientist needed to figure out what was happening.
I guess badge bars are in one way better than putting bumper stickers on the car - you can remove them easily and they won't cause contrast when the paint around them fades and lightens. Otherwise I can't really see why people would want to turn their cars into roving Christmas trees, but then there are a lot of things people do to their cars that tend to perplex me.....
The dealer I bought my coupe from stuck a dealer sticker on my Solstice without asking. I told them the car wasn't leaving until they'd removed it. They said it would be easy to remove. I said written guarantee that they'd repaint if that turned out to be untrue, or they had to remove it right there. They removed it. No idea what anyone would want to be a free billboard for a dealer, either. Guess I'm just a curmudgeon!