The problem with having new riders wear a helmet for the first year or two is that many new riders break the law, and are only caught after they crash and get hurt. The most famous examples are Arnold Shwarzennegger with his less than full face helmets, former Terminator movie star and ex- California governator; and Ben Rothlisburger, Packers quarterback (I know the spelling is wrong for their foreign last names).
Here is one article about Big Ben, it makes you wonder if he would have done better during the last Superbowl, if he did not break his face and rattle his brain in 2006 while a noobie on a 1,300cc Hayabusa with no fricken helmet on in city traffic, not even one of those goofy Nazi helmets with no liner and a spike on top:
http://sports.espn.go.com/nfl/news/story?id=2490987
Here is an article about The Ahnold’s crash:
http://www.motorcyclecruiser.com/streetsurvival/arnold_schwarzeneggar_crash/index.html