I'm not entirely sure what's your exact threat scenario, if someone records your image, especially given that you've said it doesn't matter to you whether it gets siphoned straight into some megacorp database, or private home server, or gets processed on-device only.
But... aren't already existing protections that make it e.g. illegal to distribute your image or its derivatives sufficient? If someone does you wrong, you can seek recourse. If everyone is respectful of each other (and we hate corporations instead of technologies), we enable a lot legitimate uses, making the world better: more accessible, and easier to learn and understand.