We have compulsory getting our name ticked off...what we do from that point on is up to us.
I also have a lot of sympathy with those who don't want to preference every candidate.
Why should I say for example that I prefer the Shooters Party more than One Nation. In reality I don't prefer either of them!
But, as I say what you choose to do once you've got your name ticked off is up to you!