People love to point out when bikers do not wear a helmet, but what about automobile drivers/passengers not wearing helmets?

Various statistics that I've seen cite automobile accidents as the leading cause of traumatic brain injuries. If that's the case, why aren't automobile drivers/passengers wearing them?

Sure, give bikers a hard time, but go out and buy yourself a helmet if you drive a car. And tell all of your friends, family, and coworkers too.

Also, be wary of too much hype: http://bicyclesafe.com/helmets.html

P.S. Yes, I'm a biker.
P.S.S. Yes, I wear a helmet.