I've got a few open source projects out there, and I've almost never received any PRs for them until AI, simply because they were things I did for myself and never really promoted to anyone else. But now I'm getting obviously-AI PRs on a regular basis. Somehow people are using AI to find my unpromoted stuff and submit PRs to it.
My canned response now is to respond, "Can you link me to the documentation you're using for this?" It works like a charm, the clanker doesn't ever respond.