His only "crime" in the article is moderating/posting non-nude pictures of teenage girls -- while removing actual nude pictures of the same.
This is not an actual crime and while society discourages non-nude pictures of teenage girls -- as it forms part of an unofficial no-go zone between adult pornography and pedophilia -- there are whole industries (modelling, beauty pageants, pop singers) that thrive doing exactly this to 16 year old girls.
So Adrian Chen is creeped out by a legal behavior and decides to defame someone who is -- on all other apparent metrics -- a positive, diligent member of a number of communities. Additionally, Chen has heaped shame and entirely fictional guilt (since there's no crime) on this person to the point where he feels he needs to withdraw.
Chen seems like the troll here.