Why they don't use zero knowledge proof? Also question for the USA constitution experts, is this considered a violation of free speech? The article is not clear on this.
replies(8):
There were major Supreme Court rulings on the topic recently, see
https://news.ycombinator.com/item?id=44397799 ("US Supreme Court Upholds Texas Porn ID Law (wired.com)"—5 months ago, 212 comments)
https://en.wikipedia.org/wiki/Free_Speech_Coalition_v._Paxto...