David Baddiel explores the impact social media is having on our behaviour, both online and off.

A self-confessed Twitter addict, David is in no doubt that there are positive sides to these platforms - revolutionising communication, highlighting important issues and propelling social change. But he also believes there's a darker side to the way we interact online - one where outrage and angry exchanges frequently dominate, with a negativity developing that spills offline and into real life.

Ultimately, David asks whether something originally designed to help us talk to each other is just leading to everyone shouting at each other.