I have the greatest respect for Captain Mel, but Mel's comment is pretty darn ridiculous, just look at it owns contradictions.
Fish are eating "Chummed" baits, so often, that they then begin to equate stunned fish as "free safe food", so much so that they then would hang around in red tide areas to eat, when they see stunned fish, totally over-riding their ingrained survival instinct and their need for oxygen
This statement asusmes that fish have the power to reason or at least the ability to learn by association, so by that rationale, it also makes sense that they would learn or at least associate, eating stunned fish leads to being hooked and caught, so by then why wouldn't they stop eating stunned fish.
I think far too many people, give way too much credence to the suggestion of fish having the ability to learn, if they could learn they wouldn't get caught more than once, especially on artificials.
We tend to anthropomorphize a fishes instinctual behaviour to behaviour determined by reasoning.
As for the original threads question, does it
harm the fishery, that's something of a misnomer too? What does that mean, does it harm the fish, or does it harm the fishing?
All this extra free food that is being distributed to the fish, makes it easier for them to eat, without expending energy, so if they can now eat without working for it, they must surely grow quicker and faster, which in turn would
improve the fishery.
However to the question of "does chumming harm the fishing", I would say for artificial users, it must have some deleterious effect, with free easy to eat food being presented to them on a very regular basis, the fish are less likely to expend energy chasing a lure.
However does it harm the fishing for bait users, obviously not as by chumming they catch more fish?
I personally would not want to take a guided trip and sling baits, but most guided fishermen, or to quote Bucaroo, people who use "Paid fishing Buddies" (which always makes me smile, as Buc takes trips with paid fishing buddies every year) are out of towners, who have laid out considerable money to sample Florida fishing, and they want to catch fish, and that is made considerably easier by chumming baits.
As for harming the bait fish stocks, I don't believe for one minute that baitfish in Tampa Bay are in peril. Just take a ride out to the middle of the bay or under the Skyway and you will find acres of bait, and it's been like that all year long.
I haven't been catching any extraordinarily skinny fish either, which they would be, if there wasn't enough bait around for them to eat.
"If you don't know history, then you don't know anything. You are a leaf that doesn't know it is part of a tree." - Michael Crichton