As for O'Leary going to prison, forget it. My expert opinion (2nd hand from a human rights lawyer) is that he can claim the damage to FR would be immense if he were to do some chookie and the judge would be obliged to consider that as an important social factor.
With the greatest of respect to your human rights lawyer, this is nonsence. Contempt is contempt and the courts are not much amused by same.
The reality is that he can easily purge his contempt, possibly by an apology, possibly via other means (perhaps a fine). Prison only comes in if he keeps up his behaviour and even MOL knows that the courts are not for his verbal gymnastics or threats.
The issue comes back to this: will the courts determine that there was contempt, or not? We will know the answer later this the week. We also know that Ryanair will spin this as positively as they can, no matter what the outcome.