Even without considering the rights and wrongs it's going to be interesting to see how this pans out.
I bet the Aviation Herald are going to be pleased with lots of free publicity - I feel sure this action will hit the tabloid press within the next few days.
Of course people should not be posting libelous statements and there are laws about that but I think if Ryanair won this one it would, in my opinion, be more of a pyrrhic victory - don't underestimate the power of the people and social media!