Manipulating the Internet

Mukul Devichand interviews a man who supplies 'bots' - that is, software routines that artificially create trends or boost follower numbers using fake identities. It's a legal grey area - not a crime but a violation of Twitter and other networks terms of service.

But is there a moral dimension to acquiring 'fake followers'? We meet a man who bought thousands of them, lost them and now suffers from deep pangs of regret.

Also featuring David Cuen, BBC languages social media editor, in the studio.

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