The media is allowed to bring a cell phone to the Masters, but we have to bring it straight to the Media Center and we have to register it. We are not allowed to bring the phone onto the golf course, and we shouldn't be.
One TV reporter left his phone in his shirt pocket, however, and walked onto the course. A security guard saw it. Even though the phone was turned off, the security guard escorted the man back to the Media Center and threatened to take his badge. Lose that badge, that credential, and neither you nor the company for which you work will get it back.
A meeting was scheduled with a Masters' official. Had the phone been turned on, the credential would have been seized. But the reporter was given a warning, a lecture and a second chance.
I wish the rule applied elsewhere.
Bring a telephone into a movie theater and, if it's turned on, you get kicked out. Talk loudly on a cell phone in a restaurant and, oops, see you. Speak into a phone at the gym and, unless you're in the lobby or in a hallway, your membership is revoked.
I hear people in my gym, often on ellipitcal machines, get on the phone and say a variety of things, among them, "I'm working out."