The group has vowed to increase the tone of their protest and they would be on the streets "as long as it takes".
The pace of reduction in emissions called for by Extinction Rebellion is far faster than that urged by the United Nations' Intergovernmental Panel on Climate Change, which past year recommended they be cut to zero on a global basis by 2050.
The three men and three women who were released from custody on Friday morning were arrested while participating in Extinction Rebellion (XR) demonstrations which have been taking place in the capital since Monday.
The group has called on the Government to enact "legally binding policy changes to make Ireland carbon neutral by 2030".
"Targeting public transport in this way would only damage the cause of all of us who want to tackle climate change", he said in a statement.
"But at the same time we need to take actions that are disruptive so everyone understands the dangers we're facing right now", she explained.
Mr O'Carroll said the voice of youth is "everything" in this campaign and that "we are here for our children and our grandchildren".
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Disrupting the services of an airport that could endanger the safe operation or safety of passengers and staff is a crime.
Three protesters who disrupted a light railway system when they glued themselves to trains on Wednesday have been charged with public disorder offenses and appeared in court on Thursday.
More than 1,000 officers have been deployed daily to deal with the protests and more than 570 people have been arrested.
The people charged are Cathy Eastburn, 51, from Lambeth, south London; Mark Ovland, 35 of Somerton, Somerset; and Luke Watson, 29, of Manuden, Essex.
Police have said they expect the demonstrations to continue in the next few weeks.
But protesters have still got their four strongholds of Parliament Square, Waterloo Bridge, Marble Arch and Oxford Circus and it is causing a harmful slowdown in footfall and spending.
The planned action at the airport comes at the end of a week of demonstrations that has seen major London roads closed to traffic and more than 400 people arrested across the capital.
People have shared images of the protesters on O'Connell Street.