Twitter mobs aren’t always out for vengeance – as one elated dog owner will attest

The Twitter mob was at it again last weekend, using the power of the medium to mobilise a pressure group out of nothing more substantial than a hashtag. We have heard much about how Twitter influences outcomes in public life recently  – compare Sir Tim Hunt and the television newsreader Kay Burley – but this is a story from the frontiers of social media which provides a welcome counterbalance.