Ipod venting

In principle, I have nothing against people listening to their mp3 players on their way to and from work but please don't have it on so loud that the rest of us have to put up with the sound of muffled music. Next to nails being scraped against a blackboard and styrofoam rubbing together, I find muffled music extremely annoying. Either put the music over a speaker so that it can come across clean and crisp or turn down the volume. Thankyou. The end.