Earlier quoted context omitted.
I think the argument is that earphones could be used as a garroting device.
Would be interesting if they designed a pair of earbuds that had a deliberately weak cable so it couldn't be used as a weapon
Make tiny wireless earbuds. They can tune into a prison radio station. They are recharged by getting a new one from a prison employee.
But... then somebody might figure out how to take them apart and use the wires to affix a sharpened PCB to their shiv.