I read in the paper last weekend, that a 63 year old guy, who was training for a triathalon, got killed by what was probably a great white just 150 yards off the coast of some San Diego, CA beach.
I would have to agree that the food chain must be maintained. By saying we could do without them, I was speaking metaphorically. I personally think they are beautiful animals, and of course I don't go in the ocean.