"Please keep cell phone use to a minimum, and speak quietly into your phone when in use. On the behalf of your fellow passengers, we ask you to be considerate, and exercise discretion. Thank you."
No, no, no. Here's how to do it:
"On behalf of all the scam artists and personality thieves on the train, we'd like to ask you to speak loudly and clearly into your cell phone at all times, especially when discussing information of a personal or private nature. Thank you!"That should work.
