I don't think you get it - someone has won the rights to A-League in some other country (say South Africa), if they stream it to people outside of their country (say NZ) then they are committing copyright infringement - regardless of if you the end user is paying or not.
The court case was aimed at those who are making the stream not those who are watching the stream and yes that was tested in court and those 7 streamers were found in breach of the copyright act.
People who watch a stream are at this stage not the attention but I'm pretty sure at some point people who own rights as well as people who have won them will be turning their attention to them.
1 way to stop the problem is to have more content available online - and I think that's something SKY need to improve on but there will always be some content someone somehow legitimises in their own head that streaming isn't stealing - but it is.
I agree with what you are saying about better online offerings though. Illegal operators are often actually the forerunner of legal versions- Napster came before iTunes, torrents came before Netflix, etc. Unfortunately SkyGo is plagued with errors, FanPass doesn't have all the sports channels for some unfathomable reason, and who knows what the hell is happening with beIN connect.