Whilst many people believe that WikiLeaks has completed a total back flip by preferencing a number of “right wing” parties above the Greens, it must be understood that the two were always united by convenience, and were never united by ideology.
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Preferences, Policy and Preposterous Parties - 2013 Election Guide
When you vote above the line, you are actually giving whomsoever gets your one vote absolute power over where you vote is directed. This often means your vote might swing through a raft of lesser known and morally reprehensible extremist parties faster than you can say "I don't like it." Make sure you know your stuff before fulfilling your constitutional duty.