I don't believe in fluorocarbon, but I am skeptical, other than in very highly pressured fisheries, of the magnitude of its likely long-term deleterious impact overall on birds, etc. in the surrounding environs.
Nature is a cruel mistress in her own right with or without our direct assistance. There are many species of birds where over winter mortality takes the majority of individuals. This is also true (or nearly true) of various species of fish. It's why the mourning dove produces up to 3 broods annually and why the female brook trout routinely lays however may hundred eggs she does in order to eventually produce a handful of adults to perpetuate the species.
And while it is true that our impacts on these systems can therefore be seen as additive to overall mortality, it can also be argued that, with a limited number of exceptions, our impact is like a 20 second timed drip being added to a waterfall. More indistinguishable than additive in a real world sense.
I feel basically the same way about lead, although I'd certainly agree that it is a much greater potential danger than fluorocarbon in more heavily pressured fisheries. So, I wouldn't really be against banning lead, but it would (in some cases) strike me as a bit PC.
In the end, we have to accept that our sport by nature is intrusive and potentially disruptive to nature. It is a blood sport that only recently has been given a new paint job of propriety and hyper environmental sensitivity. This is not a bad thing, not at all. But it is a school of thought in need of rational limits.
Wake me up when we get around to prohibiting wading other than in shoes with built in jet packs to allow us to hover a few inches above the substrate so that we do not disturb the balance of aquatic invertebrates...
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