I honestly thought they were kidding, but the CEO of Ryanair is today reported as confirming that they intend to introduce charges to use the toilets on their airplanes "within two years". I am still not sure about this, and report this story with a large pinch of salt. Michael O'Leary was speaking as the company announced annual results. The company now claims to be Europe's largest airline both by passenger numbers and company value. The company made an operating profit over the year, but managed to lose 222 million euros on it's investment in Aer Lingus pushing the company as a whole to it's first loss in 20 years. The press release that accompanies these figures is remarkably hostile to the board of Aer Lingus, and is worth a read if you are interested in such matters.
Ryan Air Press Release