Toilets & Jump seats
First of all from what I can gather after reading all these six pages of very informative material, I don't think that Ryan Air's management has anything to do with that the captain did. I don't suppose the captain radioed HQ for permission to carry these so-called "swowaways", and if he did and permission was granted, then he should be absolved.
Second point. I don't know about recently, but about 10 years ago our favorite airline, Aeroflot, still adhered to the policy of strap-hangers for those passengers who could not run fast enough from the gate to the plane and find a seat.
Working in a Russian world as a foreign journalist, I was on plenty internal flights that used to carry not only passengers, but also their intimate belongings -- like chickens, pigs, goats and sheep, in addition to the TV sets and stereos in packaged cartons scattered along the isle. You wouldn't dare check the item, because someone would likely steal it at chek-in or before luggage retreival.
If someone cares to correct me, fine. I was thrown out of the Soviet Union and haven't been back, but from what I understand, the internal flight system has not changed much.