Kiwi singer Lizzy Marvelly is behind a campaign hoping to shift attitudes about consent and sexual violence.
The #MyBodyMyTerms movement calls out attitudes which allow groups like the Roastbusters to form and victims to blame themselves for their own sexual assaults.
A video explaining the meaning behind the hashtag has been viewed more than 60,000 times.
"In a culture where rape survivors blame themselves for the criminal actions of their rapists where young people aren't sure what constitutes consent, where intimate photographs are shared online, and where a group of young men can form a club called the 'Roastbusters' and get away with it, we need to have some open and honest conversations," the movement's Facebook bio says.
"Victim-blaming is sadly prevalent, revenge porn cases are now becoming common, here in New Zealand we have the worst rates of sexual violence in the OECD, and education about consent is not widespread in our schools."