Universal Language (of Annoyance)

I guess the 21st-century equivalent of annoying those around you by blasting your music out of a boombox is annoying those around you by playing your music through the tiny, worthless speakers built into your cell phone.

I believe this started with people choosing not to answer their phones when someone called, so they could listen to whatever song they had chosen for a ringtone, but it's gone beyond that now. Do you really think your music sounds better coming out of those flimsy, half-inch openings than through headphones?

(This is another behavior I have observed twice recently, and the Rule of Three will also have to be applied, if it gets to that point.)