[20] Past committee members include Derek Walsh as Editor of Secular Sunday,[21] Ashling O'Brien who campaigned on repealing the 8th and spoke to the Citizen's Assembly on this issue [22] and John Hamill of thefreethoughtprophet.com.

Not long after its formation, members of the Atheist Ireland community appeared on radio station Clare FM to discuss the role of atheism in Irish culture.

[24] Since then Atheist Ireland spokespersons Michael Nugent, Jane Donnelly and John Hamill have frequently been interviewed on Irish media [25] on freedom of thought issues.

In 2009, the Minister for Justice, Equality and Law Reform, Dermot Ahern, proposed amendments to the Defamation Bill, including a statutory offence of blasphemous libel prosecutable liable to a fine of up to €100,000.

[27] The group received support from author and scientist Richard Dawkins, politician Ivana Bacik, and writers Graham Linehan and Arthur Mathews, among others.

He pointed out that to become a judge, a member of the Irish Council of State, or President of Ireland, a candidate must first swear a religious oath, and said that amendments were immediately required to address all such issues.

[29] On 1 January 2010, the date on which the law came into effect, the group published a series of potentially blasphemous quotations on its website and vowed to challenge any resulting legal action.

[30][31] On 25 June 2015 Michael Nugent discussed Atheist Ireland's complaint about RTÉ broadcasting the Angelus, with George Hook on Newstalk Radio.

Michael identified that he believed RTÉ think that their proposed alterations were appropriately inclusive, yet have failed to meet the requirements of a state-funded television network.

[32] In 2016 Atheist Ireland refused an invitation to attend the state commemoration of the Easter Rising the chairman, Michael Nugent saying "The 1916 Rising involved an undemocratic group killing innocent people, based on a Proclamation whose authors claimed that Ireland was acting through them in the name of God...The reason for using the wrong date is to make the commemorations coincide with the Christian holiday of Easter".

Atheist Ireland claimed the goal was to demonstrate the law's ineffectiveness legally as well as its intention to protect religious belief as "the legislation is so ambiguous that it’s impossible to tell how it will be interpreted by the authorities.

In an article on the Lede blog he said:[40]What makes the Irish group’s attempt to break the law seem particularly tame is that it came on the same day last week that an ax-wielding man in Denmark tried to attack a cartoonist who offended millions of Muslims by publishing a drawing thought to show the Prophet Muhammad with a bomb in his turban.

[57] Schools run by religious organisations, but receiving public money and recognition, cannot discriminate against pupils based upon religion or lack thereof.

This outlined the four areas they wanted reform for in the school system to remove "religious discrimination": Patronage, Access, Curriculum and Teaching.

In July 2016 Atheist Ireland published a report on the setting up of the State exam course on religion,[63] developed by the National Council for the Curriculum and Assessment (NCCA).

[74] In September 2019 Atheist Ireland produced free lesson plans for primary schools[75] which can also be used in conjunction with their 2017 self published book Is My Family Odd About Gods?.

[76] In August 2020 Atheist Ireland commissioned barrister at law James Kane to give a legal opinion [77] on specific questions on the right to opt out of religious instruction under Article 44.2.4 of the Irish constitution.