Shin posted a link to a verticas article that started this train of thought in my head. It theorizes that psi phenomena is basically soul energy, or a byproduct of the soul.
While I don't fully agree with this article, and I really don't agree with this article if I remember the wording correctly on what it describes is psi, let us consider it to be true, hypothetically, for the sake of this debate. If psi entails using your soul "energy", is it ethical? If psionic sparring or the like involves the destruction/alteration of another person's soul energy, is it ethical?
Do you have a link to the article? Before I can make a comment, I think I should read it.