I have not found the adult marking yet, and I am dabbling currently with extensions and with game filtering. It is meta data and you do not see that on the game page, nor on the browse thumbnail. Although I did not search for that information specifically. The wrapper they use for adult confirmation dialogue is gone, once clicked away. And that a game is non adult, is evident because it was displayed to you in the first place - hence I consider the whole issue as a bug. Trivially you could just modify the browse url. But why bother. They just need to delete the tags from their exception list. Or how am I to believe they implemented the feature in the first place? It is a feature and it has a configuration. It has to. Even if they cannot remove the feature just like that, they should still be able to configure it to do nothing, if no tags are on that naughty list anymore.