Two. Thou shalt not wear thy earpiece when thou art not on thy phone. You there, the one wearing the Bluetooth earpiece because you are just so important that at any given moment, a critical call could come through, and you need to be able to answer it while gesticulating wildly as if to say, I am so important, I have a Bluetooth earpiece that I must wear at all times. Yeah, you. Knock that off, would ya?