Companies are now getting good impact from social media but a marketing expert says that online discourse has become more volatile and smart companies should be aware of that.
"Social media will have a bigger impact because what was once a lone voice can take on a large audience, says Bodo Lang, a senior lecturer in the marketing department and Auckland University.
Lang says social media reaction is democratic and good. But has a dark side with some companies tweeting against the competition.
"Brands can be held ransom by social media, he said.
The debate over social media, cyber-bullying and Charlotte Dawson's trials with social media attacks being highlighted in relation to reason for suicide has emphasised how much the game is changing. Online safety organisations like Netsafe report increasing aggression by abusers on social media, led by so-called "keyboard warriors".