I was taking the train home from university in the evening. At some point, a guy, who was talking on the telephone, seated himself beside me. At first, I didn´t really acknowledge him but after some time I looked over and glanced at his phone (which I normally wouldn´t do and I don´t know why I did it in that moment). 

To my surprise and also shock he had taken a photo of the girl who was sitting opposite of him. Even worse, he scrolled through his photo library and there were several more pictures of strange girls on trains, which he obviously took without them noticing. At first, I wasn´t certain on what to do and when he got up to sit somewhere else (for whatever reasons) I informed the girl that I don´t want to scare her but the creepy dude who was just sitting here made a photo of her. She thanked me and when she got off he, fortunately, didn´t follow.

Now my question is: am I the asshole for not confronting him? I´m a woman myself and not very strong and to be honest I was just scared of that man. I even checked to make sure that he was not getting off at the same stop as me. And now I´m not sure if the thing I did was right or not.

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