Who cares what other people do. No helmets are good for organ transplantation. If you're going to wear a helmet, you're kidding yourself if it's not full face. There are statistics about what part of your head hits the pavement first. Somewhere between %30-40 of the time it's the lower face and jaw. If you would like to chew your food instead of sucking it up through a straw, use a full-face helmet.