Actually according to KMG, Draupadi's sons were not killed in their sleep.
They were attacked at night...but they had woken up n had died fighting.
Nonetheless, I find it unethical as the war was practically over...n Ashwathama had attacked their camp when theywere asleep.
But according to Srimad Bhagavatam, Draupadi's children were killed in their sleep... 😭
Coming to your question...like someone here said Drona would have died back in shame...Or atleast he should have.
More than Draupadi's son( as per KMG), it is the act of releasing Brahmastra/Brahmashira at a young pregnant girl n the wombs of other women like Draupadi n Subhadra that I find more loathsome...How cowardly can a man be that he resorts to attacking women when he doesnt succeed in defeating the men!!
Guru Drone would have died back in shame!!