Not sure what others think; I'm probably just being an old fart, but it annoys me greatly that Ryanair appear to be joking about safety; posting the now famous spoof safety card on their own website, plus the various other 'suggestions' about safety cards, oxygen masks, emergency exits etc. Heaven help them if they ever have a serious incident, that is all I can say.
My proposal for a discretionary charge is as follows - a discretionary charge to NOT fly with Ryanair. This would be calculated as the difference between Ryanair's fare and the fare of an alternative airline, offset of course by the fact that I need to pay extra to check in, to have a pee, plus of course the taxi fares that I'd otherwise need to pay to get me from the Ryanair airstrip to the city that I actually want to travel to...