Bears don't bother you. If you are mad at Great Whites because they are at the top of the food chain in the ocean, which they really aren't, go pick a fight with one of them.
I'm sorry but this is way too Captain Nemo for me. Bears hardly ever attack.
Great white sharks are about 150 times less likely to kill you then God and His thunderbolts.
If you want the thrill of exposing yourself to death, why not take up surfing in the Farrallons? Great waves and huge. You'll get a full adrenal rush from the waves which will kill you, maybe a curious white shark, and the real king of the food chain, killer whales. Oh, killer whales hardly ever attack people either, unless provoked.
By the way, White Sharks are relatively rare, and they travel over great distances to feed and breed. Film "The Great White Shark highway"
goes into great depth on how these are social, relatively smart, incredible animals. We are REALLY lucky that they don't view humans the way you view them. They are well equipped to bite you in half with one bite for fun.
As you have pointed out, the combination of a huge, giant animal(s)
with razor sharp teeth, that ambushes it's prey by accelerating to 25-35 miles an hour, and hitting it from below, pretty much the equal of getting hit by a Mazda Miata with teeth, well, as I said, thank God they don't view you as the challenge you view them.
The good news is they don't like the way we taste, and only bit by accident, and rarely at that, usually caused by us being stupid enough to look like the prey they are hunting, in the area the prey usually is.
Sometimes I can't help but think that humans are going to be the death of the planet, and all that is beautiful on it.
Don't get me started on Shark Fin soup.:banghead:
OK: Now that I'm done with my rant: If you are considering this contact Phil S.
http://www.grizzlyskinsofalaska.com/
He's on the famous side for booking hunts for bears in Alaska.