My favorite announcement was heard years ago at FLL. Joan Rivers was on my flight to LGA, was signing autographs and saying hello to all of the snowbirds at the gate. There was a terminal wide announcement that said,
"Attention Joan Rivers, you are creating a disturbance at the gate and you must cease immediately or we will send the airport police over to restrain you. Joan, you do this all of the time and have been warned before not to be so friendly!"
Everyone around that gate including the GA's were laughing hysterically!