It's been a little while since I had a satellite dish last, but I remember all too well how grand it looked mounted to the front of the house I was renting. It was a tiny house too, so even being a small satellite dish it seemed to eat the entire front of the place.
Although using a sticker to hide a satellite dish seems silly it would be fairly effective. It would at least minimize the amount that it stands out. Although I doubt that it would become completely invisible.
As of now these stickers are only available for satellite customers in the UK. Each sticker is custom made to blend in with your wall, hopefully soon these will hit the US as well.