Dad of internet troll Tristan Barker says he is just focused on his music THE famous rock star dad of internet troll Tristan Barker has touched down in Adelaide to appear at this weekend's WOMADelaide festival. Michael Barker, a former drummer of bands Split Enz and The John Butler Trio, told News Ltd he is focusing on "making good music" and "earning a quid" rather than the sideshow his son has become in recent days. The unrepentant-sounding father said of his son's online abuse of a string of victims: "We live in a world where we can voice our opinions and that is a great thing." He had previously supported his son's online diatribes. Today Tonight has previewed their story on the notorious Tristan Barker, including his alleged assault on a Today Tonight reporter. Featuring next week on Seven. Mr Barker is staying at Adelaide's Hilton hotel. He is in South Australia to play in his two-piece The Swamp Thing group. His 18-year-old son has previously played in the same roots band. Mr Barker questioned the assertion that his son was impacting on his career. "Destroying (my career)?" he said, shocked. I won't deny this is not normal for me to have people like you talking to me about this type of thing. Mr Barker's son will appear in New Zealand's Rotorua District Court on Monday accused of assaulting a Today Tonight reporter who travelled Down Under to interview the infamous internet troll. Some footage of the incident emerged online today and will screen in full on Monday night's episode of Today Tonight. Journalist David Eccleston had travelled to the Bay of Plenty region of Haumurana to interview Australia's most prolific troll. He landed back in Sydney on Wednesday and was receiving medical attention. He will appear in Rotorua District Court on March 11. As the matter is before the court police will be making no further comment. Meanwhile, a friend of Mr Barker jnr, "Nebz Adlay," posted a message online last night saying because of legal issues his mate would not be using social media until further notice. Who is Tristan Barker? Barker, 18, has a track record of terrorising vulnerable members of the community, and has said his aim was to see how far he can push his 300,000-plus teenage internet-subscribed fans. He has used internet portals Facebook and Twitter to encourage harassment and ridicule of everyone from Muslims, businesses, local and overseas celebrities, murder victims and people who have committed suicide as a result of online bullying. As well as using his own personal Facebook profile, which has more than 300,000 "friends," to push nasty crusades, Mr Barker is also a ringleader of Facebeef, a Facebook group page with 43,000 "likes."