As for the arguements that abo should be included .. it already is. Wanker is used alot, but only as a common noun, and the usuage isn't unique. Same for the other words mentioned.

Though other commonwealth countries (such as new zealand) may use cunt in a similar fashion, Australians do seem to use it more. However, this arguement is irrelevent since many "Australian" words such as "mate, bloke" etc are used extensively in NZ, and the UK, though are still in the article.
R0m