We can argue about the definition of a weed, but part of it is surely a plant's ability to make itself thoroughly, immovably at home, often despite your best efforts to persuade it to go away. Among native plants, there can hardly be a better illustration of this than ivy.
If you don't like ivy, the bad news is that it's also one of the main beneficiaries of climate change. As an evergreen climber of mostly subtropical affinities, ivy was never very fond of cold winters. But now that such things are increasingly rare, ivy
