Do you really see this as a reasonable thing to ask this person to do, just to prove their age to a robot?

As a reasonable thing to ask a citizen to do? No.

As a reasonable form of civil disobedience? No - better to use Garry's Mod or whatever to bypass it entirely.

It is beyond reasonable to put on so much tattoo on the face. (How did he go through all that pain)

If tā moko strikes you as painful you're not ready for women's moko kauae tattoos on the lips.

https://www.newzealand.com/int/feature/ta-moko-maori-tattoo/

It's quite extreme, but I believe society is already implicitly punishing people who do this quite enough, no need for technology to pile on further.

You expect this guy to spend time putting on makeup every time he wants to crank his hog?