Do we have an actual answer?

[velvetpage]

Could it really be this simple? Nutshell version: a programmer in France puts a ban on all things erotic. Except that in France, the word they use for erotic is "adulte." He understandably translated that as "adult," which put in place a code that was meant to be applied only to erotica - on 57 000 books ranging from the LGBT ones, to the sex and disability ones, to health textbooks, right around the world.

Comments

[velvetpage.livejournal.com]

It has also had the tidy side-effect of questioning whether all things LGBT should be classified as adult - whether society has a double standard when it comes to LGBT issues as opposed to straight romance. A fic writer on my list is checking the tags on a lot of her fics to find out if she herself, a lesbian, has been unconsciously deeming all slash as more adult than all hetero romance.