For a long time I have advocated that this list be closed so that only subscribers can post to it - especially to stop the spam that appears here on a fairly regular basis.
I know that others with more influence than me have advocated otherwise (and for valid reasons), but I would still personally prefer to see this happen to linux-aus. In fact I personally wouldn't mind if the list was fully moderated, but for many here this would be going a bit too far :)
Cheers
Tony