I called out one fella who then tried to defend his actions because "everybody copies stuff on the Internet" and he got aggressive and tried to get me banned on my own instance. My admin blocked his account for the exact reasons we are talking about here.
His view was that so long as he didn't explicitly claim he took a photo, then it's no big deal. And he was offended at the accusation of stealing other people's work. He just doesn't see that it's wrong or misleading.