I dont get what your trying to defend here. why anyone would want to defend the killing of spawners is beyond me, maybe your one of those guys thats owns a smoker for the late season or just combines all Fish caught into fried fishcakes? To each their own. Why would you want to kill anything not silver? Its like that episode of the Simpsons where Homer chases the roast pig trying to convince himself its still good! If it aint Chrome go home.
It is not to defend those bonking spawners, but rather those bonking fish that are in various stage of colouring up. As he says, fish do not change from chrome to "spawning" colours in one momment, they change gradually. A Chum may be bright silver but show those bars underneath, is it legal? A coho may appear a little dark on the belly but still be bright silver on the sides, is it illegal? When exactly does a fish stop being "chrome" and become illegal to kill? It is one thing to say your fish is too coloured, you
should release it, and it is quite another to say that fish is not chrome enough, you get a $200 fine.