Astute observation.
Here in Michigan you have to wear a helmet, which is fine although I feel it's just another infringement on your personal rights but there was an interesting study done by the Motorcycle Safety Foundation. I can't remember the study word-for-word, but basically it stated that in states that didn't have a mandatory helmet law, helmets bought by riders were of good to excellent quality whereas in states that had mandatory helmet laws, the riders bought the least inexpensive helmets they could purchase.
The shorty helmets are really popular here. They look just like an equestrian riding helmet and the discount stores around here sell them for about 25-30 bucks. I live near the state line (Ohio & Michigan) and everyday I see scores of riders stop at the line and take off even their shorty helmets and stow them. Interestingly, it's the cruiser riders who do this. The ****** rocket guys most all wear full face lids and never take 'em off.
There was also another study done and a ensuing court case where the Judge in the Michigan Court of Appeals reversed a decision by a lower court that stated that the Michigan State Police could pull a biker over for probable cause and then check his helmet to make sure it was DOT or Snell approved. The court found that the DOT and Snell standards weren't being adhered to by helmet manufacturers, the manufacturers weren't even testing the helmets at random. They were just buying the stickers in bulk and applying them to their helmets. It was the contention of the State Police to issue citations for non-complying helmets. I understand that the State Police were still stopping bikers and checking helmets as a probable cause and then looking for other infractions. What a crock of ****.
I guess it's a vanity issue, but, your melon is basically soft tissue and liquid with a thin bone covering much like a watermelon. Take a watermelon and slam it on the pavement and see what happens......seeds go everywhere.
I tend to wear a leather jacket and a good helmet though not a full face model. I own 2 full face lids, both very expensive but I don't like the total confinement or the heat. The full face is good for snowmobiling and that's it, for me.
Helmets seem to fall into the category of loud pipes, you know, louder means slower. Slower means no helmet because louder and no helmet is cool, that is, until the rider becomes a statistic.