What constitutes fair comment, as opposed to defamation, on social media and should the standard be the same as for traditional media? Is the freedom inherent in social media threatened by the chilling effect of potential claims for libel? To what extent should tweeters and bloggers be as aware of the dangers of libel as are professional journalists? Karlin Lillington of The Irish Times, barrister John Maher, TJ McIntyre, Lecturer in Law at University College Dublin, and Google’s John Kampfner discuss with Myles Dungan.