People don't wear helmets whilst cycling because they simply don't care about the risks of head trauma (also I see at least 200 cyclists a day when I'm working and I would guarantee that at least 99% of them wear a helmet), but that is none of my concern. What is my concern is if you start ridiculing people for taking extra precautionary measure when they are ALREADY PROVIDED. Also, no where did I say you should wear a seatbelt on a motorcycle, I'm not sure why you are making such a point, the two are completely different vehicles and their safety designs are very different. And I have ridden motorcycles my whole life, both as rider and pillion passenger. And all times I have worn a padded jacket and a helmet. I have come of a motorbike twice and have avoided any serious injury because of these precautionary measures. Again, I'm not understanding how it comes into play here when we are talking about using a safety feature that is a part of the vehicle.