Earlier quoted context omitted.
Isn't prey by definition in danger. If you honestly believe what you're saying you're going to have a REALLY BAD TIME in the wild.
Depends on the environment - in that book for example, Arctic wolves were not the cause of large (in physical size - the caribou) prey animal population decline, even though the "feelings" of the average person was that they must be the reason. Outside of fiction, wolves are not ravenous beasts that hunt everything and anything in sight. Predators do tend to go for the weak/sick, older or younger/inexperienced target…
Prey is whatever is at risk of being consumed. I have made no attempt at classifying wolves behavior in my comment.
Edit: I do take the prey/predator relationship very seriously, I wrote about what I do here https://news.ycombinator.com/item?id=46462101