So that future iterations of StableDiffusion (or similar models) don't end up getting trained on their own outputs.

Oh wow, I didn't even think of that. I am pretty sure a few of the repo's have turned off the invisible watermark, I wonder if that will have consequences down the line for training data.

... so this means that watermarking an image you own is probably the only way to avoid it being used for training further models? :-)