Many invasives are everywhere, indeed. But I don't think it's necessary to be fatalistic about it. My point, though, is that if you are actively planting thing

Many invasives are everywhere, indeed. But I don't think it's necessary to be fatalistic about it. My point, though, is that if you are actively planting things, you should use ones that are endemic to your area. And why not, you're tipping the scales ever so slightly towards the natives. We hike a lot, usually twice a weekend, and whenever we can, we pull an invasive tansy which is hepatoxic to deer and other native animals. Since we started this practice a couple years ago, there seems to be a noticeable reduction of tansy along our more frequented trails. Another non-native around here is a European beachgrass which early settlers planted to "stabilize" the sand dunes along beaches. It has done that for sure but has also taken over and become a monoculture and destroyed the dune dynamics and crowded out all the native plants. It's extremely hard to remove and require either a lot of hand digging or herbicide application. Over many years of work, the situation is improving though.