In track pants and a warm jacket, Robyn Polley looks just like any other parent on the sidelines at busy kids' winter sports events.
But the Hamilton mum-of-three isn't there just for fun.
As a sports programmes co-ordinator for the Waikato Institute for Leisure and Sport Studies, she attends junior netball and football games incognito to report on sideline behaviour. It's believed she is the only person in the country doing that job.
"Clubs and schools have contacted me if they have been having problems on the sidelines and I will go to games unannounced to find out what is going on," says Polley, 49. "I then report my findings back to the club or school. It is then up to them whether any action is taken against anyone who may have stepped out of line."
Polley says the worst behaviour she's encountered was at a Year 9 Saturday school netball match last year.