Hunting is not the solution - sharks play a major role in our marine ecosystems, being a cross between land predators such as lions AND jackals in that they take out the weak and sick fish and also act as marine garbage men.
Their presence in supposedly increasing numbers is simply a result of cleaning up our harbours and beaches and protection of mangroves ie more fish more sharks.
Anyone who has grown up on the coast during the past 50 years has seen this combination of cleaner waterways being matched by more and more people using them ie more surfers, divers, swimmers etc., so the numbers of "accidents" (do we really think most sharks really set out to "attack" us?) involving sharks biting humans will grow too.
I'm as scared of sharks as anyone (would be terrified of swimming in the open sea at night but ironically in younger days have swum in Pittwater in the dark, a much dumber move).
And there's an old saying it's not the shark you see but the shark you DON'T see you've got to worry about: had to laugh at the ABC journo surfer this morning who while suggesting some form of culling claimed he hadn't seen a shark on Sydney Northern Beaches in decades "until now". {Pal, they are there all the time, and I have seen them even if you haven't!)
But I've been snorkelling in the past three weeks and not felt spooked even though I knew there were a lot more sharks around at present - just made sure I (1) wasn't in the harbour (2) wasn't doing it in overcast and murky conditions and (3) not doing it at dusk/dawn.
And if I have a second sense, or feel uncomfortable in the water - most divers will tell you how you can often sense there's a major predator around, just like in the jungle all the little (prey) critters vanish or go really quiet when a tiger is patrolling - I get out of the water. Better to feel foolish or miss a wave than risk a bite!
All three attacks occurred in warning times - either dawn (if the report of the Avalon attack at 6.30am is correct) dusk (Bondi) and in the murky fish-laden harbour (in overcast conditions).
One down the coast near Wollongong recently occurred near a boat ramp (where fish are gutted and cleaned).
It's just a matter of taking care wherever possible: get to know your local fishers and divers, read the fishing columns and read the advice given out by groups like the surfrider foundation.
The stats are still much higher that you'll be hit by a car, struck by lightning or stung by a bee. Should we wipe out bees too? Look up the stats as to how many people die from bee/wasp stings!
The old woman of the sea