1. Ryanair do not charge people to go to the toilet, but you might have a good idea there. Having toilets cost money - to service between flights and by taking up space that could be used for seats. Either way you pay for them, in a charge for those who use it or as part of each persons ticket price - take your choice.
2. They can will either fill it with cargo or leave it empty depending on demand. In the first case, Ryanair get paid to transport it and in the second the flight will use less fuel. In either case, the result is cheaper tickets for passengers.
Wikipedia suggests that Ryanair release these outlandish ideas once in a while to get some free publicity. While I obviously can't verify that I'm personally inclined to believe it. Since even restaurants have regulations which force them to have toilets when they are over a certain size I can't imagine this idea would be legal. If it is then it'd only be a matter of time before someone who had one too many coffees before getting on board sued them for breaching their human rights by not letting them go to the toilet!
I'd agree Ryanair take the opposite model from what was described in this article but they have also highly optimized their approach. No seat back pockets for you to dump your rubbish etc.
If it is then it'd only be a matter of time before someone who had one too many coffees before getting on board sued them for breaching their human rights by not letting them go to the toilet!
You could avoid that by making it a rebate - pay the usual price for the flight, then if you don't use the toilet at all you can claim x back afterwards.
2. They can will either fill it with cargo or leave it empty depending on demand. In the first case, Ryanair get paid to transport it and in the second the flight will use less fuel. In either case, the result is cheaper tickets for passengers.