6 habaneros? You kiddin’ me? You would have to be up close because the air itself diffuses the effects. I could understand if they were in the class rooms.
i once cooked 1/4 of a habanero, and choked my family out of our house... and we eat hot, spicy food... even our children do... a couple of weeks ago i cooked a serrano pepper (my favorite) and every time someone walked into the house, they started coughing... it was kind of funny :)