phyllodes barely jsut like young stems. nto only weak, they ar so filled with oils its next to useless.
distribution should for sure play into ethical, so if its native it becomes a greater thing. though where AC is native, the concern isnt killing it so much as its very common and planted by the government, but it stops soil erosion. so teh real issue with harvesting it is landslides, not killing trees. in OZ, Hawaii etc its a pest, and could justifiably be killed without thought and they do. in these cases, perhaps the most important issue is land management, as one needs to protect the ecosystem. so how you kill them, remove them, in what densitiy and how you are planting after/during is the main thing. making a slope bald to get rid of an invasive tends not to work out well for the mountain.