Ian K said..
From what I can gather.
1. The GWS move about a lot
2. There's no evidence that any single shark has developed a taste for humans and become a repeat offender
Therefore attacks are due to chance encounters.
To reduce the incidence of chance encounter by 50% you either reduce the number of swimmers by 50% or the global shark population by 50%
There's 3,500 GWS according to Wikipeadi, conservation status is vulnerable.
Cull 1,750 vulnerable GWS to reduce the toll by 50%
No
If you can't handle the current low probability of getting bitten don't go in the water.
Spot on. Further to the point, surfers, kitesurfers and windsurfers + divers etc should be the only ones whos opinion counts (water users in general, not land lubbers or sailors)