All domestic routes in Italy will cease to operate from Saturday, January 23. It's the result of ongoing row with ENAC concerning the ID identification requirements. ENAC wants Ryanair to accept a variety of less secure forms of identification on domestic Italian flights.
I agree with Ryanair on this one. I don't see why ENAC should be allowed to interfere with what, at the end of the day, is a commercial decision by the airline.
The visa stamp requirement, where they are unwilling to provide checks close to gate areas even at large bases such as STN/DUB and where I have seen passengers lied to on numerous occasions, is quite another story.