[Paddlewise] Use of helmets in the surf zone

While discussing kayaking in the surf zone, Bob Volin wrote:
>And please wear a helmet.

I've often wondered about this.  Clearly, if the surf zone is rocky, 
a helmet will help prevent, or at least lessen, injury.  But if the 
surf zone is entirely sand covered (as it is along much of the 
eastern U.S. coast and Florida), wouldn't a helmet be a potential 
liability?  I would imagine that the helmet would result in much more 
'friction' with a sandy bottom resulting in a much greater risk of 
neck injury.  What are other's thoughts and practices?

Brian C.
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