Why would minors be required to take part in this? To access age-restricted material suitable to them (not 18+ but maybe 13+), or would this registration be mandatory for everyone?
1. Minors will attempt to access porn sites
2. They will be faced with the picture validation
3. Some of them will try it
4. They will theoretically fail the validation, but the porn site will still be required to keep the data from the attempt.
But don’t worry, porn sites must also run a biometric analysis on the images sent to check if the user is 18+!
I guess the opt out would be to not use those platforms, but that seems unlikely.