SeaI find it a little ironic that folks who participate in a bloodsport like fly fishing that has enjoyed the introduction of invasive species (see Trout Culture) all over the world are kvetching about culling a few sea lions that have grown fat and sassy in the absence of predators and are having a deleterious effect on anadromous fish stocks that are on the verge of extinction. It's not the answer to the problem, but it's part of the solution. As @Salmo_g has said, the genie is out of the bottle and it ain't going back. We have negatively impacted, and in some cases irreparably destroyed, most, if not all ecosystems on the earth. What we are left with is trying to mitigate what we have done. Our desire to have sport fishing has done far more damage than this initiative, and this might actually have a positive impact.