Youth Defence are, in case anyone doesn't know and given that the defacement is now gone, a fairly unpleasant, far-right, anti-abortion group in Ireland:
A pretty despicable organisation that currently is straight out lying about proposed abortion legislation and is attempting to pressure the government by publicising that if they push legislation through they are baby killers.
Although I enjoyed seeing their site hacked they'll milk in terms of being "persecuted".
http://www.conorfarrell.com/wordpress/social-issues/the-prob... http://www.politicalworld.org/showthread.php?14529-Youth-Def...