They deserve the 3-letter word too. There is nothing wrong with wearing headphones as far as I'm concerned, but why the hell not just keep to the right while you're doing this? Does it not occur to people that it's a path that others might use? And that they should leave passing space when it's safe to do so? I'm always extremely conscious of how much space I take up and whether it's necessary... and so many people are just completely oblivious to this. Or else they just figure they are too important to make space for other trail/road users. Either way they are acting like asses.