In 2009, Kostakidis served on the National Human Rights Consultation Committee chaired by Frank Brennan. The Committee inquired into the adequacy of the protection and promotion of human rights in Australia, holding consultations in metropolitan, rural and remote areas across the country, and receiving over 35,000 written submissions. They recommended a raft of measures, the most contentious of which was a Human Rights Act. Human rights education was the measure that had the greatest support of those that took part in the consultation, but the overwhelming majority supported human rights legislation. The four member Committee also included Mick Palmer and Tammy Williams.