Back to this point about accidents with headphones. I listen to music all the time when training, but never at all on race day. I just love to hear the crowds, the other people around me, so music is just something i dont need. But while training. I have never had an accident with headphones, mostly because i am street smart. You look around you, whats going on. Approach a road turning, your senses become heightened. You have this 1000 yard stare. I nearly got hit by a car pulling out of his driveway, but that was him not paying attention, and could easily have happened, if i didnt have headphones on.
Bottom line, you run with headphones, you do it carefully. When i do an organised run and see other people with headphones on, i dont stear clear of them, but experience shapes you, so if i had a bad experience with someone, then i probably would. I always find, that if you get your right place in the crowd, then people with headphones dont become a problem anyway.
Actually my closest accident to date on an organised run was a guy who didnt have headphones, and dropped his plastic water bottle deliberately and i had to do my Mario Donkey Kong to avoid it, and the 20 others behind me.