I don’t have any real opinion on this question, but do have a couple of things to add. I’ve lived long enough to see the introduction of several invasive species, and the attempts to either eliminate them or control their spread. None have been successful. As an example, it should have been possible to keep zebra mussels confined in Eastern Canada, but they are now common in Manitoba even though we are part of a different watershed. The general public moves around too much, and doesn’t practice good hygiene (like washing boats, not transporting wood). Eventually, the organisms just become another part of the ecosystem. So unless there is a well organized program to eliminate a life form when it gets a toe hold in a place, I think it’s a lost cause. Unless the removal of invasive plants will do damage, digging them up will likely make people feel better, but won’t have much of a long term impact.