I didn't trigger anything in my playthrough. Fallen rangers make no sense, anyway. I mean besides straying from their ties with nature, I don't see why they could ever be considered fallen like paladins do. It'd be more like druids straying from neutral in my opinion.
Rangers have stuff like "urban tracker" where you're not even some nature lover like other ones are. You're more of a hunter than anything, anyway, and that does away with really any ties with nature.
