I play a game with people talking on their BT device, where I pretend I don't already know that, and I talk back to them as if they're talking to me. The object

I play a game with people talking on their BT device, where I pretend I don't already know that, and I talk back to them as if they're talking to me. The object of the game is to see how long I can keep them from their other conversation by refusing to acknowledge their device.