Police have cleared Hughes MP Craig Kelly after investigating an altercation involving him and a climate change activist dressed as a dinosaur.
Peter Thompson, of Miranda, who was wearing the outfit when he and Mr Kelly clashed at Sutherland train station on May 1, made a formal complaint to police, alleging verbal assault and intimidation.
A police spokeswoman said on Monday, "Further inquiries into the incident were conducted, including viewing CCTV".
"No further police action will be taken into the matter," she said.
Mr Kelly said the matter had "always been a frivolous and vexatious complaint".
"I hope the man in the dinosaur outfit apologises for wasting police time and resources - and also hopefully he learns a lesson that he should not sneak up behind people," he said.
Mr Thompson said the detective who investigated the incident told him the CCTV vision was "partial" and "inconclusive".
Mr Thompson said he wouldn't be apologising because "an angry threat was made and I saw it and so did a witness".
"I think he should be apologising to me," he said.
Mr Thompson said he crossed paths with Mr Kelly at a pre-poll centre on Monday and the MP "greeted me quite jovially".
Climate change activists have been using dinosaur suits, with the name Craig Kelly Denialosaur attached, to target the MP during the election campaign over his strong views on global warming.
After the train station incident, Mr Kelly said he "reacted the same way anyone else would in the same situation".
Mr Kelly said he was talking to another activist "when I felt something brushing right up against me from behind".
"I turned around and said, 'rack off, don't sneak up behind me'. He was invading my personal space."
Asked if he threatened violence, Mr Kelly said, "Absolutely not".
"Anyone who knows me knows I have never used threatening language," he said.
Mr Thompson said "Craig Kelly swivelled around, raised a clenched fist and said, 'f... off. If you come up behind me like that again, I am going to punch you out'."