Nothing to do with sport? BS. He is a registered player agent - he is part of the sport.
As for what he does in his spare time, well it's entirely relevant if he has breached athe Agents' Code of Conduct, which he has in about four areas.
Whatever. I for one dont want to go on the AFL site and read that Chris Judd's accountant is a cross dresser or that Brendon Fevola's lawyer had an affair with a married woman.
Its not sport its celebrity gossip.
If Nixon loses his career I don't give a rats it will affect him adversely but his clients will move on.