When I was a kid, Con Edison had a tagline on their trucks: Clean Energy. Kids would graffiti over that and turn it into "an orgy."
While living in Chicago in my late teens, there was a street gang called the Latin Eagles. They would scrawl their tag everywhere. I once saw one re-written and turned into Eaten Bagels.
I guess my point is a consumer control one. Once your message enters the world, it is no longer yours.
