Guy on my flight in the row in front, travelling with wife and teenage daughter (14 I overheard). I spent 4 hours listening to him being verbally abusive to his family, swearing constantly. I had my earphones on and it was loud enough to hear him still. Eventually after I witnessed him swearing in his teenagers face again, while yanking her headphones off her head aggressively getting her hair all caught, I stood up and asked him what he was doing, and did he realise how many small children were sitting near him having to listen to his constant swearing. Told him I didn’t want to hear anymore of it. He apologised but then called me a mug under his breathe. This then lead to a bit of a row which nearly got him taken off the flight. Doubting myself whether I should have just stayed quiet, I could have caused the flight to have been diverted (well he could) but my blood was boiling listening to it for so long.