Whales that kill

So, Shamu killed his trainer. And they say, its rare. And Borrowitz asks - If, as reported, killer whales rarely kill, how did they get their name?

So now I learn(from here) that killer whales really don't kill humans. They just kill others. And, sometimes mistakenly kills humans thinking they are not humans. Hmm. Interesting. I wonder how do we communicate properly with these beasts of preys that we are humans and should be let alone?

Perhaps, by simply letting them be in the sea and not messing with them? But, if we have to have fun looking at them imitating cute tricks(inside our natural buildings), i guess we should not be surprised about this too.