What if students had to kill during USJ raid?

They were outnumbered, stressed and out of options. I could see Kaminari frying someone's brain for good, Bakugou overestimaing a villain's durability. Todoroki leaving someone to die because they had a fire quirk etc. I wonder how it would affect everything from moral, legal and other perspectives? What if Tsuyu snapped and killed Shigaraki when he was running at her, also stopping the Noumu in ht process?