Stable Diffusion 2.0 has already made changes to make infringement harder by removing names of artists and celebrities from the dataset, which is probably the right move -- now if you want to emulate e.g. Greg Rutkowski you actually have to figure out how to describe his style in the prompt, teaching you a little about what makes his art special and making it easier to create your own style along the way.
Or get a bunch of Greg Rutkowski paintings and perform textual inversion to get an embedding of his style, which is what people are actually doing, and go back to square 1.
If the result of this is an image that infringes on his copyright — I'd imagine this would have to be a pretty 1-1 copy, since his style appears to very generic — then the burden should still be on the person who produced the image and published it.
