An Auckland primary school has pulled therapeutic diffusers from the classroom after a high court threat from a parent who said the essential oils could trigger asthma attacks.

On Wednesday, Milford Primary School on Auckland's North Shore put diffusers in 20 classrooms with oil blends designed to "stop the spread of viruses and keep children focused at school".

That evening the school board received a letter threatening High Court action from a parent who is also a lawyer.

Auckland barrister Tim Rainey, who has a son at the school, said he took action because there was no consultation with parents before the decision was made to use diffusers in the classrooms.

The question of whether he was right to call for their removal was put to media commentator Irene Gardiner and Coast Breakfast host Jason Reeves. 

The two also discussed gun law reform and getting consent from your children around sharing their photos on social media.