Trying to drive the other guy out of business is the name of the game in business.
Indeed, Ryanair are not the only ones guilty of this.
Aer Lingus did its utmost to put Jet Magic out of business.
Easyjet hunted bmibaby off the Gatwick route ever before Ryanair hunted Easyjet off the Gatwick route.
At that rate the CAA (Cork Airport Authority???? = DAA) would be banning most airlines, which legally they could never do anyway.
Hoping for Ryanair expansion myself tomorrow. And hopefully new (currently unserved!) routes, but I'm not holding breath