So weird images are a big problem? No they don't matter at all.
So what does a deepfake matter?
A national news story in the US tonight, Lyft driver caught faking photos of his messy car. Not the most intelligent fraudster as he left the Gemini logo on the corner of the image.
Providing these four examples in good faith :) also generally I _dislike_ DRM
You should also think about whether, suddenly, courts can now trust images they see because this technology exists?
I think thats not even basically plausible.
What image is going to change your worldview so radically that the drm saves you?
edit - to be clear you are watermarking 100,000 fishes with mustaches because of your concern over 1 image that "matters" (and you don't even have an image that matters in mind)