I suppose that most people with headphones will not be run over but I also know that they don't seem to hear my bell or voice when I try to pass them. They are lost in their own little world and that makes their entertainment my safety problem. So, while I'm happy if you find the perfect headphones, you are asking in the commuter forum and that gives me the right to an opinion on your plan. And my opinion is that you shouldn't wear headphones when commuting.