Over the last few years Facebook has been hugging, kissing, poking and prodding us within an inch of our lives. Sure some people find it annoying but you can always just ignore the playfully abusive advances of those on your friends list.
I find it okay that they're trying alternative means really. Since there's no reasonable way of getting in touch with those people, one might be inclined to consider such routes. To be honest I don't care too much if it's invasion of someone's privacy. I mean, hey, they're trying to run away from paying for what used to be their house, so they kinda forfeit the right to fair treatment imo.
Who the hell are you guys who are opposed to this?!
This is an Australian ruling by an Australian court for Australians!!! So shove off!
And if you're Australian, then stop being un-Australian and recognise our courts! There is a political process for you to air your concerns.
If a person can be contacted by Facebook - or any means, about a legal matter, then it should stand. The point is not that the plaintiffs are obligated to receive these documents via Facebook, just that it is one of the now manifold recognised ways of contacting them if other 'usual' methods are unsuccessful.