[9] In June 2022 O’Hanlon wrote an article titled "Women must be free to speak without fear of trans backlash", which alleged that transgender activists are using public money to radically reshape society behind the scenes while trying to silence dissent.
[10] In August 2022 O’Hanlon wrote an article titled "The future will condemn us for pandering to the trans agenda" which criticised Irish politicians and media figures for not condemning the NHS Gender Identity Development Service in the United Kingdom where many Irish children were sent, and compared it to incidents of child abuse by the Catholic Church in Ireland.
[13] In October 2023, O'Hanlon published a commentary in the Irish Independent praising the stance of religious academic Colette Colfer who publicly refused to follow her employer's policy on gender identity.
Her elder sister was the late Provisional Irish Republican Army member and Sinn Féin politician, Siobhán O'Hanlon and she is a cousin of the Labour party senator Máiriá Cahill.
The two sisters remained estranged at the time of Siobhán's death from breast cancer, due to Eilis's criticism of Sinn Féin.