He takes a special interest in human rights and mass communication, in particular freedom of speech, freedom of the press, media accountability, pluralism and access to government information. Furthermore, he is a member of the complaints committees of the Commissariaat voor de Media (Dutch Media Authority) and the Nederlandse Publieke Omroep (Netherlands Public Broadcasting. He is also an editor of the Dutch journal Mediaforum and responsible for the quarterly column 'Mediarecht' (Media Law) in Ars Aequi.