I seriously have no clue. This is my beater bike, I'm proud of it's shittiness. The shittier it looks, the less likely some fucktard will try to steal it.
I think it started with the DALLAS sticker on the top tube and then I got one here and there and now it's becoming a thing, I think in a couple of years it'll be completely covered with stickers and one will think twice to look at it.
It functions like a charm. Just got a new chain and cassette, new brake pads, new rear tire, tuned up and and slighting customized (I shortened up the handlebars to help me navigate in narrow passages between cars on my morning commute.)
While I agree with EC that factory decals and such can be unsightly, I do think there's always exceptions:
My other bike.