I was wondering what the general opinion on wearing helmets for training is? I started racing when all you had to have was a 'hairnet' type helmet, then went through the requirement for USCF racers to wear a hard shell helmet. At the time most of us complained, but now i am very happy to wear my Giro on every ride. However, I notice that there seems to be a growing trend to go helmet less on training rides and most of the riders I observe without them appear to appear to be skilled cyclists. However, I recall that my cycling skill did not prevent me from crashing from time to time nor did it stop crazy drivers from doing stupid things. At this point I know two people with serious head injuries. Both nearly died. One wore a helmet, the other not. Both wear helmets now and are lucky to be alive. What are the prevailing opinions out there now?