Zoo,
If you agree that reef safe means that the animal is not likely to bites corals, then Niger trigger is reef safe. IMO, this is Jim's definition of reef safe. You on the other hand, feel that Niger trigger is not reef safe due to their large size, aggressive ness and their tendency to make meals out of smaller mobile animals (almost any fish or shrimp in home aquarium will be smaller than an 18 inches fish).
Scott Michael stated in his book that Niger Trigger is "harmless to corals". As I pointed out before, the mouth shape make it almost impossible for the Niger Trigger to bite, or pick things off of the reef structure unless he swim up side down.
Although I did not read through all of your references, I am sure that none of these site state that the Niger Triggers are not reef safe because they eat corals. IMO and IME, Niger trigger is a huge fish that will eats smaller fishes and crustaceans. For that reason, I choose not to put one into my reef. I have seen several smaller Niger Triggers in reef tanks without significant problems. If well fed, and put in last, they will not bother smaller fishes like damsels, Royal Gramma ect. If there is an established larger (5+ inches) Niger trigger in a reef, any smaller fish add into the tank will not last for 15 minutes because Niger Trigger is an extremely fast swimmer, and a very aggressive feeder.
Common guys, I think both of you are right, and that your position is essentially the same. It seems from your posts, that we have a fist fight if you both in the same room right now.
Minh