Two problems with age verification:
1) Studies show it can lead to dramatic “bounce” rates. Users often don’t want to go through the process, especially when the content they’re trying to access is sensitive or the process is onerous.
2) Right now, we don’t need to show credentials to access much of the digital world. That’s true in much of the physical world, too. But if some proposed age-verification protocols go into effect, the default may become showing your papers to use the internet.
Professor Eric Goldman’s conclusion below is worth considering, and his full write-up is worth your time.