I don't wear headphones because I like the sounds around me. But I don't see the safety factor. What am I going to do jump off my bike everytime I hear a car vrooming behind me? You'd have to have the volume pretty damn loud not to hear sirens, bells, etc.
Oh yea and what data junkie mentioned...
Originally Posted by Digital_Cowboy
Show me just one law that says that a person has a right to exercise their judgement or common sense, just one.
I don't tell people what to do. But since you solicited opinions, I'll say that for myself, I would never, ever consider using anything on a bike that would or could impede the flow of information regarding my surroundings, regardless of whether I'm on a road or a MUP. Things happen way too fast and the consequences are way too severe.
And questions of safety aside, when I cycle, I do so to enjoy cycling. When I listen to music, I sit down and just listen to music. They're both worthy of my undivided attention; I get more out of them that way.
I do use my ipod whilst cycling, but keep the volumes at a level where I can still hear what's going on around me, I find it also helps me to be able to hear the bell on my bike when asking pedestrians to make way.