I feel sorry for the staff who have to handle the Ryanair flights. Most work for companies contracted to handle, are paid poorly and are abused beyond belief by the passengers most of whom don't bother to read the terms and conditions of the flight booking.
All airlines and airport operators should ensure a suitable system is in place to deal with passengers requiring special assistance rather than let it come to a court case like this.
Long live the low cost operators, even Ryanair, but make sure you remember who your customers are as without them you wouldn't exist.