Mr de Thierry said although he hadn't seen the email from the Ministry of Education, it didn't mean his pupils weren't at risk. "We certainly haven't seen anything at Rotorua Intermediate but often this kind of behaviour trickles down from older siblings who take part in the trend."
Mr de Thierry said children were "very impressionable" and never saw the consequences of these activities.
"The videos on YouTube never show people getting injured so younger children see it and think it's easy, harmless and they're bulletproof. With trends like the 'fire challenge', the chances of a person being injured for life is exceptionally high but these kids don't think about that."
John Paul College principal Patrick Walsh said it was a "very dangerous thing some students thought was okay to do".
"It is the teenage culture to test the boundaries but social media is pushing this, so in order to get publicity and 'look cool', teenagers are doing increasingly extreme things."
Mr Walsh said he would not raise the issue to his students as it could result in the opposite effect of what was intended. "There have been no students in my school or any others I am associated with that have taken part in the challenge so I think by speaking with them about it you are giving the trend publicity and could potentially alert the students' curiosity to it."
Rotorua Fire Brigade senior station officer Colin Rolfe said all they could do was advise people not to try it.