One commentator wrote that "Hardiman’s greatest contribution ...was the steadfast defence of civil liberties and individual rights" and that "He was a champion of defendants' rights and a bulwark against any attempt by an Garda Síochána to abuse its powers". His concern for individual rights was not confined to Ireland: in February 2016, he criticized what he described as the radical undermining of the presumption of innocence, especially in sex cases, by the methods used in the UK's Operation Yewtree inquiry into historical sex allegations against celebrities, and he also criticized "experienced lawyer" and then US presidential candidate Hillary Clinton for allegedly declaring in January that "every accuser was to be believed, only to amend her view when asked if it applied to women who had made allegations against her husband", former US President Bill Clinton.