Spotted something a bit concerning on #wikipedia today: a user with 23x nonsensical-but-plausible-looking chatGPT created articles (all now deleted), and another with six. https://en.wikipedia.org/wiki/Wikipedia:Administrators%27_noticeboard/Incidents#Suspected_hoax_content_and_LLM_use_by_User:Gyan.Know - we didn't have the immediate rush of nonsense we were expecting, but there's definitely some seeping in
Checked this with different samples of the same article: lead alone is likely entirely AI, some early sections possibly AI, some late sections likely entirely human. Very messy.
(Interestingly the later sections are the ones noting some kind of critical commentary, which might be relevant?)