Bush parody banned, his permission necessary first
The Britain-based Broadcast Advertising Clearance Center, an advertising watchdog, has banned a commercial for a British animated comedy series called "2DTV" (that makes fun of politicians and celebrities) featuring George W., wanting to watch a video but placing it in his toaster to burn it by mistake, according to this AP story in the New York Times (registration required):
The clearance center monitors compliance with rules governing advertising on British television. One of its guidelines says that living people should not be caricatured or referred to in advertisements without their permission.
...The producer of "2DTV," Giles Pilbrow, said requiring satirists to seek permission from their targets was "an idiotic request" that would mean asking Osama bin Laden or Saddam Hussein if it was all right to caricature them.
"I doubt we could get bin Laden's permission — he's a bit tricky to track down at the moment," Mr. Pilbrow said.