I remember when I had a brand new Alfa 156 from the **** Alfa dealer in Cheltenham (they were REALLY ****) and I went to collect it they had added 3 stick on badges and 2 window stickers. The salesman came out, full cheesy grin to be confronted with me saying "you can take those ****ing stickers off and one mark and I'll reject the car". He just sulked, turned around and about an hour later back came the car.
I hate stickers and dealer badges.