Not got round to buying one yet. But more importantly if you do have one (or more!), do you take them down and hide them when parked 'behind enemy lines', or run the risk of returning to a burnt out shell that used to be your car?!
Just sold my Alfa Romeo which had 2 Albion stickers on the back window. I work in Croydon and every day I walked back to my car after work, I expected to either see graffiti on it or smashed windows from any roaving PALACE fans !!!
I'd rather not spoil my car with stickers, but I do have a 'Stadium Yes' sticker because we need to keep the message out there; it will be removed when the government finally gets round to saying yes.