The Yes Equality group has called the hacking of the Youth Defence website a 'despicable' and 'disrespectful' act.
Yesterday its homepage was replaced with a picture of the new George's Street mural of a male couple.
It comes as both sides of the debate launch new public campaigns with just five weeks to go until polling day.
Yes Equality Spokesperson Grainne Healy is calling for a respectful debate - and says hacking should have no place in the referendum campaign.
