We are about justice, doing curses is also part of Zevism, is part of doing justice. There is high and proper judgement before taking thiese decisions. Doing justice is also ethical, and bring good karma, while doing nothing in front of injustice is complicity and an evil act.
When it's necessary, we don't hesitate.
For anyone who know the Mahabharata, the Vedic Poem, or the 5th Veda. The war of Kurukshetra happened because of the kaurava, sons of Dhṛtarāṣṭra. His quality is that he sees the situations, he never act, even when he know it's wrong to not act, he never correct his evil sons, for emotional reasons and also his own emotional weakness.
That war caused the death of milions in the Poem.
Ironically also, why black magick doesn't want to do black magick for just causes?