As long as they fired or fined a couple of teachers as well for allowing such a thing to happen in the first place. However, since this takes place in Japan where teachers are never fined or even much reprimanded, it leads to nobody getting any punishment at all. Just as well, though, considering it's a fighting school to begin with. In a fight hesitation is oft worse than making a mistake and thus they can't encourage the students to second-guess their decisions all the time in fear of repercussions.

Naturally the situation would have been different if they had been in an unauthorised place fighting with the suits.