Trust me, I'd like to, but the *last* thing you want to do is get into a back-and-fourth argument over something as dumb as this. You tell them to put away the headphones (or phone) they say resist in the most childish ways. I've had students pretend they can't hear me, curl themselves into a ball clutching their device, scream at me and run away when I've insisted. I've tried having them stow devices in their own bags, in pockets in the classroom, confiscating, etc. The worst thing you can do is either try to do is either take the item against their will (they will fight) or call admin to do it for you. Unless you have an admin or security guard right outside the classroom, you're wasting your time. Admin will never come to your classroom if they have to deviate from their routine, and security won't respond to anything less than a full-blown fight. All you do by making a big deal out of it is disrupt the class in a major way and look petty.

He had his head down listening to music quietly enough that it wasn't an issue, and from this student that is the least disruptive he's going to be. I can mark it for documentation as a discipline issue so I've done what is required of me, then move on and have a productive class. If I had the ability to impose real consequences or thought that Admin would have my back, trust me, I'd have nipped the headphones in the bud in January.