Silly question. How do you know when you have "lined" a fish?

I have hooked over 30 salmon this year where one hook was IN the mouth, and the other was under the jaw, in the eye, on the side of the head, or on the top of the head (all over). This is with a standard fixed 2-hook mooching set-up. I had no problem keeping these fish if they were legal to keep, about 1 in 5 fish were, but what are your thoughts?

I also caught one hatchery silver that was hooked in the top of the head, and the other hook was free, but the lower right jaw had been ripped away from the joint. I figured that the first hook had ripped free and kept the fish.

Andy