Emily from IRidetheHarlemLine, working her deep bench of conductor contacts, has gotten her mitts on the Shhh! cards that Metro-North conductors will hand out when riders inevitably break the rules of the quiet cars that launch Monday. 
Emily is doubtful the concept will fly. She opines:
A businessman that gets on the train and insists he needs to have a cell-phone conference call. As the train is packed, the only available seat is in the quiet car. Because he’s paid Metro-North several hundred dollars for a monthly pass, he feels he deserves that seat, and the fact that it is in a quiet car doesn’t concern him.
She’s therefore tweaked the cards a bit to better reach scofflaw riders.
Had a “quiet-car” episode on Wednesday night, on a trip to Montclair. Girl directly behind me had a FREMIX LOUDLY! thumping away, and she was oblivious to several Wack-a-Mole heads turning up to get her attention, and finally a tap on shoulder from her seat-mate. She didn’t realize that everyone else could overhear. “Really, you can hear this? Really?”