I live near the seaside and last night popped out to take some photos of the sunset. There were quite a few people about. I was leaning against a railing by the beach focusing on a shot when a guy came right up behind me. He didn't touch me, just came really close behind me and kind of whispered in my ear, I can't remember what, but probably something to do with me taking a photo. I'm a naturally anxious person and felt hugely uncomfortable with this invasion of my space. So I told him to fuck off. He backed away laughing, he was holding a pint and was probably a bit pissed. The laughter unsettled me more, so I shouted fuck off again. I know it was a bit of an overreaction, but it just felt humiliating to be laughed at for getting a fright. He then kept laughing and mimicking me shouting fuck off. So I just left and went straight home. He seemed to be with a girlfriend, but she didn't say or do anything, just stared at me when I swore at him. I mentioned it to my mum today and she thinks I should have reported him to the police. I feel that would be an overreaction. Any thoughts?