I love the concept of wanting to sue but not knowing what grounds to do it on...technically this is not a free speech issue Quantas reserves the right to refuse service based on any number of things no one is gaurenteed anything when interacting with a business as long as it is not government owned...it is no different then reading playboy on a flight most flight attendants will ask you to put the magazine away because others may find it offensive...when you have that much humanity jammed into a giant biscut tube with wings you need to think about the other people on the plane.