It's okay man, it is clear to me that wasn't your intention, thread got derailed by a misunderstanding of your question.
My answer to the original question: I think people are way too naive to post photos on the internet and expect them NOT to be downloaded. Sure, morally it's a grey area, but if you don't upload them, or share them, or use them as blackmail or something weird, then I don't see a how it cause any problems. If you never share them no one ever knows you have them, right?
Plus it's easier than training your photographic memory skills
But that thread is trashed now so let's move on and pretend all this never happened..