I throw my fish on the ice and place them in a plastic bag when I travel home. When I get home, I light the fish on fire and roast marshmellows over its burning carcass, effectively absorbing it's soul. The soul-shmellow is subsequently sliced up and consumed amidst a chorus of satanic rumblings and ominously low-lighting from my crappy kitchen lightbulb.
If you think that bonking the fish is any more "humane" than any other fishing, hooking and releasing, aquaculture, stocking (are we giving the fish more friends to hang out with), then you are very naive. Fishing is firstly to feed people, secondly a sport. Your imaginary line between "humane" and not "humane" treatment, based on a fish flopping on the ice, is completely made up in your head.
Wasting edible fish, or trying to hurt the fish for fun is deplorable and disturbing. Beyond that, enjoy your catch whichever way you prefer.