So far 11,500 artists, musicians, writers, and other creative professionals have signed a short open letter denouncing the use of their work to train AI without permission, The Washington Post reports.

Here’s the whole thing:

“The unlicensed use of creative works for training generative AI is a major, unjust threat to the livelihoods of the people behind those works, and must not be permitted.”

OpenAI and others have been training their AI models on these artists’ songs, movies, and text, among other content, saying the information counts as fair use. The big names who’ve signed the letter — including Kazuo Ishiguro, Thom Yorke, Kevin Bacon, Julianne Moore, Ann Patchett, Melissa Joan Hart — don’t think so. Scarlett Johansson, whose voice was seemingly used for OpenAI’s chatbot, doesn’t appeared to have signed yet.

In less of a symbolic gesture, a number of lawsuits on the topic are winding their way through the courts.