Well if someone had a numbers matching, near perfect, concourse ready car and wanted to put a sticker on it that's his business. I suppose someone could buy it from him/her and take the sticker off. I don't personally like large dia wheels with skinny low profile tires on them but if someone else wants to put them on their bird, go for it.
If it bothers someone to see a sticker on an air cleaner they'd really freak out looking at the wiring under my hood, maybe start to black out noticing the aluminium rad and electric fans, and most likely keel-over backwards at the sight of the KRE heads. I'd hate to think what would happen if, while laying on the ground beside the car, they happen to see the TKO-600 under there.