A mother of three tweeted a picture of an elderly couple who she says refused to vacate train seats she had booked for her family. She tweeted a picture of the couple saying: "If a mum with 3 kids and bags has 4 reserved seats for a long train journey, and you're sitting in their seats on a full carriage, don't tell them that their tickets don't matter in a posh voice and then say you're not moving and refuse to make eye contact. Don't be these people." The tweet has since gone viral and also caused a debate. Is it acceptable to post pictures of people on social media to highlight bad behaviour? Ciara hears from listeners.