I was on a train yesterday and something flashed past me as I read my book. It then flashed by again. It was a child of about 8 years old on a skateboard going up and down the carriage of the moving train. He did this a few times and people started to comment about why he was allowed to do this and why his parents didn't stop him. One woman put her bag down in his path and explained that it wasn't a good idea for him to be skateboarding on a moving train. He asked her if she was the boss of the train and she replied something to the effect that he was disturbing passengers and that it was a health and safety issue. He then told her to "Shut the Fuck up" and started to walk away. His mum then appeared and said his name and walked away with him. She didn't make him apologise to the woman and I am not sure what happened next. They possibly just went a few carriages up and continued with the skateboarding.
Aibu or should his mother have made him apologise to the woman for swearing at her?