Personally I am strongly on the opinion of favoring openness, but since you asked, there was this: https://www.reddit.com/r/StableDiffusion/comments/xofxo3/a_j...
The hoax was pretty quickly debunked, as the attempt was pretty crude. The images were full of artifacts and the image sizes were all 512x512 squares (the default image size for Stable Diffusion) with no attempt made to crop it to more common aspect ratios. So in terms of harm "done" I guess it was pretty minor, but I'm still leaving it out here since it made big enough of a commotion to make it to nationwide news stories.