That’s interesting. I had an author once tell me he and a group of peers got into it with a publisher. The story was long and drawn out but my take away was that just because you say it’s copyrighted, which it is the minute you take it, really doesn’t mean much legally unless you register it with the copyright office. That has a time limit, seems like it was only 3 months after the unauthorized use. Registered before the unauthorized use and you have a case...if you want to pay a retainer to a lawyer to handle it. I could be wrong.
Probably not the case with a happy snap off an iPhone.
Sorry to further derail.