I can see both sides of the argument, so like most all I attempt to offer is my personal opinion (and we all know what has been said many time regarding personal opinions.) I am no biologist, so I have no idea how the brain mass compares, but I have seen conditioning happen with smaller fish species as snake alluded to and I'm living proof that the improbable can and does happen from time to time. My biggest concern from all of this is the bad rep that sharks end up getting; they really are beautiful creatures (and they taste pretty good grilled after being marinated in my secret sauce.)
I'll keep riding motorcycles sans a helmet and those who want to dive in chummed waters should be allowed the same freedoms to make their own choice in the matter.
