It's unclear what you're implying as you've carefully not spelt it out, but in any case posting a fact from a short-lived account does not make it not-a-fact. Respond to the post not the poster.
Now to reply the post, just because 100 years ago was legal it doesn't mean it was normal or moral. The post is more enforcing in the same direction - legal in ancient Japan, legal in modern Delaware. I am waiting for more examples of legal pedophilia.