Check in will no longer be free for all. If you've been following the news and threads on here about their recent plans, from May 20th you'll be charged £5/€5 to check in unless you have bought one of their very cheapest fares on all new bookings.
The fact that they are now charging people for a process that has to be completed in order to travel is what's causing the outrage at the moment... Bundled with their plan to charge a horrendous amount for those who have problems with printing, or forget to bring their passes to the airport. Charging £40/€40 for something that, in reality, only costs 10p or so is nothing shy of daylight robbery.
To cover a couple of your other points - you said you're probably never going to fly with them. Very good that you have a choice of other airlines. However there are people, believe it or not, that need to travel on a budget. Which is why FR appeal to so many. The reason for all the moaning and whinging which is obviously annoying you, is because they are very sneaky in how they add extra charges and fees to jack up the price, making it more costlier than first thought. And not everyone has access to these forums, or pays much attention to big news stories about FR, and don't find this out until after they've been stung - and they are more than within their rights to kick up a fuss about it.
People are always going to whinge and moan about Ryanair, because of the very way they conduct business - sneaking in charges, trying to slipstream their insurance into your booking without you noticing - and you're just going to have to put up with all the whinging. No, Ryanair won't listen and change their ways, but it's not going to stop people trying to get them to listen up.