I think it is about how you use the spell that would be dictated by alignment.
Good people might cast it so allies in a losing battle might escape in the cover.
Neutral rogues might drop it on a person in the middle of the night on an open street, then run up and rob you blind, hehe.
Evil people would cast it on someone, then sneak up and slit your throat without any fuss of you being able to defend yourself.
Magic is just magic, it is the caster that uses it for good or ill effect.