So I've done it before - I'm not perfect. And today I sat in a restaurant while the man at the next table said 'fucking' several times to his small children and wife, berated her for spending money on food they wouldn't eat and I just thought that's it. I'm never doing it again. To be fair, it's been by accident and not design but hearing this was horrible. I'd have asked him to stop but didn't want a row.