ON STAGE: Artists Against Fracking said neither the group nor supporters Yoko Ono or Sean Lennon have been told to register as lobbyists in their campaign against gas drilling in New York but will if necessary to continue their work.

THE SCRIPT: Registration would require disclosure of how much money the group has raised and how it's spent—intended as a way for the public to know who is influencing public policy.

ENCORE? Over the years, several celebrities or their groups have been required to register as lobbyists. But whether celebrities must register hinges on specific circumstances.