It is amazing how every year this topic gets debated to death. Listen I am not a die hard flosser but some of the logic used here has to make one step back and shake one's own head.
For instance, "When fishermen floss they do so with the intent of connecting the hook with the fishes mouth (same as any fishermen using bait or a fly or a lure). The reason they don't want to hook it anywhere other than the mouth is that they are required to release the fish.....
Additional facts about flossing are that the CO's allow it. They wouldn't they allow it if it was illegal. They are there to enforce the laws!
What is snagging in your books is totally irrelevant to how the law reads and how the flossing technique is regulated. Roll Eyes".
Flossing/lining a fish to me is simply getting a long leader drawing it through the fish's mouth, and bingo, bango, bongo, fish on!
Fishing shops love it because it takes very little skill to learn how to do it, and if a person can cast a spinning rod, they can catch a fish with this method. Twenty pound mono or braid line, plus bouncing betties fly off the shelf and life is good again especially in a tight economy. But let us not fool ourselves, if you think you have control over that 10 to 12 foot or even longer leader, then I have some swampland I want to sell you. It is IMHO, refined snagging. The person is not deliberately reefing back on the hook, but deftly getting it in the fishes mouth and then contact is made.
However, let us not confuse this with fly fishing. When I am nymph fishing for trout, there is no way I am lining the fish. I have seen underwater videos of this, and the fish without hesitation moves to the fly takes it in its mouth, and if the fisherman is awake it is fish on. Without a doubt totally different than flossing a salmon.
And for those who really want to see flossing in action, wait until Peg Leg appears later this summer, some of the stuff you see will leave you speechless.