In an attempt to encourage people to talk to each other on the Tube an American in London has been giving away badges in Underground stations. Jonathan Dunne's badges are printed with the words 'Tube Chat?' and have received a mixed response.

It's definitely an interesting use of a badge and shows how badges could be used to encourage a particular behaviour in real time and not just to display a message. However not all Londoners share Dunne's enthusiasm for chatting with strangers on public transport. A number of parody badges have been produced in response with messages like "No chat please, we're British".