With regards to the original post regarding non-acceptance of airside ID, it is worth remembering that there is no standard airside ID card. Sure, most people would know what a BAA card looks like, but I haven't a clue what a PIK or DUB card looks like. I'm sure the majority of people with a PC could print out a genuine looking ID for a made-up airport, laminate it, and then argue with a check-in agent that it is a genuine ID card and if BAA ID cards are acceptable why is their card not.
By having a blanket rule, Ryanair are ensuring that they do not discriminate against any one person.
How many people know what an Eilat Airport ID card looks like?