有人反对发送数据到不需要它的应用程序。 所有打开区域内的蓝牙设备都是潜在的大量设备。想想进入星巴克 - 你会看到所有其他PC - 没有一个想要你的消息。

There is an objection to sending data to an application that doesn't want it. "all turned on bluetooth devices in area" is a potentially large number of devices. Think of being in a Starbucks - you would see all other PC's - none of which want your message.