I hope that you do not think that I'm refering to anyone in particular.
It is common knowladge that many of us here go for group shoots, it is one way we can all improve. At some of these shoots, the lighting, location, timing of shoot with relation to light, setting of ext light sourse, poses, etc are created by the shoot org. himself/herself. Some of the shooters there will just shoot at the suggested angle and keep the shots as their own. Most of the time these shots are shown to friends as the photographer's own creation. I've known of some photographers who do that ( before my CS days ) and some even hang them up at home.
I'm not sure if you'll agreed, But I don't think that it'll take a Supersleuth to belive that this is a possibility.
Me? When I was very much younger and just learning photography, I did the same. It was much later that I realise that those images were not my own creation but the creation of someone else as I did nothing during the shoot but press the shutter. Don't get me wrong, it is at these sessions where the "old birds" though me some tricks, where I learn how to see the effects of lightings, how to communicate with models. Just that if I'm only pressing the shutter and nothing else, I don't think I can claim that that is my own creation.