Sharks are an endangered species, humans aren't.
In fact, shark numbers are so low as a result of human activity .... surely we could consider things a little different, even if these attacks were planned, perhaps they are 'payback' for us killing some of their ancestors like we insist on 'payback' when there is an attack.
I know it's not reality but some lateral thinking could put things into perspective a little here.....
I think most Australians are well educated in shark instincts, or at least should be if they plan on swimming in the ocean, and therefore it should be deemed unreasonable by all that we kill them for doing what is natural... as said already, they don't like to eat humans but do mistake us in our wetsuits for seals... which taste great apparently.
My brother has surfed for years and is absolutely clear about the fact that he is playing in the sharks backyard and if something comes of that it's not a grudge against him but nature taking it's course. While in our hearts we wish that he never comes to harm out there, I don't believe that any of my family would support the idea of killing a shark if it did attack as it's his choice to get out there daily.
Finally... RIP to the guy who was taken so young.