I wouldnt say it scales badly (depends on what you are comparing it against). It didnt scale too badly compared to all of the subjects available in the HSC (and remember that scaling doesnt exist anymore as well as its an outcomes based exam!! This is why UAC shouldnt exist!!
)
Maybe if people took it more seriously (take your apparent atttitude for example), it would do better in comparison to other subjects as it is the the third largest (? maybe fourth...it is 6:25 am) subject in the HSC if you dont include English and Maths (and the nubers are increasing every year). UNSW did a survey in 2001/2002 and SOR 1 and 2 ranked in the top 10 hardest subjects with regards to assumed knowledge, studable content and breadth of content Vs candidature.
having said that, its so easy to get a band 4 minimum in the subject so with some effort, you could easily average a 5 or low 6 which means it my will count (most students I know have at least 1 unit count due to them killing the exam...even if it was one of their lowest units)
/opinion
edit: if you look at this data (
www.uac.edu.au/pubs/pdf/2004-Table-A3.pdf ), it looks like (at first glance) virtually all subjects scale badly r.e. their average mark (am looking at the HSC Vs Scaled mark column)
btw> is there a better source for the so-called scalings? I know there is a comparison chart here on BoS but it has 2001/2002 data...must not be looking ahrd enough!!