Etymology is the study of the history of words, their origins, and how their form and meaning have changed over time. Folk etymology is the sound, spelling and meaning of a word which is changed by the influences of cultures. While I appreciate that there is no evidence that the screenplay reference directly inspired the subsequent incarnation in the Australian lexicon, I contend that there is nonetheless cultural currency in its inclusion in this article.  

 : If it is a case of coincidental coinage at different times, then the reference in the 1975 Star Wars draft is relevant temporally, as it seems to predate the contemporary Australian use (i.e. 'how their form and meaning have changed over time'). If it was a case of coincidental coinage across cultures, then it is relevant on the grounds of comparative Folk etymology (i.e. 'meaning of a word which is changed by the influence of cultures'). There is no doubt that George Lucas' Star Wars has been influential in popular culture, and since his use of the term 'Bogan' was also in a pejorative sense (being the draft name he attributed to the 'dark side', a defining theme of the eventual movie franchise), I contend that the consistencies of meaning between the two usages are more substantive than merely coincidental.