I wonder if we could identify the spirits in some way, but I'm not as spiritual as some of my friends. They would be able to answer that more clearly than I can.

The way they're sabotaged is by negative emotions, negative circumstances ... Sometimes, they can't help that they become that way, and it makes them spiral out of control. Part of why I had to redesign my city back home was because we needed to adjust its infrastructure so that humans and spirits could live side by side there.