I feel a motorcyclist should have the choice to choose if they wear a helmet or not, if they choose not to, that's the risk they take.
As a motorcyclist, I have occasionally ridden w/o a helmet, which usually is only around my neighborhood but going to work or a ride, I'll gear up to include a riding jacket & pants, gloves, as well as a full-face helmet.
In the (very) few times that I rode at highway speeds w/o a helmet, I disliked the wind noise and have you ever had a bug hit you in the forehead-kind of stings. How about those guys who ride all day in the sun and have "coon eyes"!! Real cool.
Was riding with a friend a few years back and he missed a corner on a country road, only going 30-35 at the time, had some serious internal injuries & fractured wrist, but his helmet did its job and protected his head-he struck a 4x4 sign post and into some brush & small trees. Luckily we were able to get him airlifted and to a hospital.
Not sure about any of you, but I'd like to minimize the possibility of having any road rash if involved in an accident. A few comments that I recall is "sweat washes", and another, "If you have a $10 head, wear a $10 helmet!" I always laugh when a guy says it's too hot to wear a helmet or it obstructs their vision-b.s.
See this video that was posted in the other thread "wood"? Should make a cyclist think twice about going w/o a helmet!
http://www.youtube.com/watch?v=rOhgMAOrp0c
And then there is the problem with all of the distracted drivers-texting, web surfing, etc., etc.