I think a photojournalists ethics should be situational because not everyone's always right and you can rely on someone to tell you what's ethical and what's not, but who's to say that that person is always right? nobody. so i think that it should be situational and the person who shot the photo should have the right to do what they think is ethical or unethical because something like that is always just going to be your opinion.
I believe that a photo can really capture the truth, but its up to you to actually show the truth in your photos.