4) They are visible best when shot in very low light conditions, like too early or too late to be hunting..
5) Tens of thousands of animals have been harvested successfully by a) shooting your effective shooting range, 2) not taking questionable shots, and 3) using some blood trailing and tracking skills. If you cant do that maybe you should stay home and watch football.
Yes, ethics are a big part of hunting but to say that they are only useful for shooting game during illegal hours is just plain ignorant. i would also argue that (sadly) thousands of game animals are lost every year due to people not knowing the shot placement. But i guess they were probably taking an 80 yard shot in the dark ,so they should have stayed home to watch football. We will all strive to be the ultimate hunter/tracker like you.