I personally have a problem roof scoops on front engine cars.
It's so obviouse that it is completely non-functional that when I look at it, instead of thinking "cool" I automatically and instinctively think "why?".
I don't have a problem with non-functional things on a car that could potentially be functional, like people with Celica's who mold side vents into their car for example. When I see side vents on a car my brain accepts it because vents in that location could provide cooling to the rear brakes, but when I see a roof scoop on a front engine car my brain thinks "hmmm, I wonder where that
air is going?".