The three biggest social networks—Facebook, Twitter and YouTube—pose the biggest risks to companies' brands, according to a survey of corporate executives including lawyers, social media managers and compliance officers surveyed by Altimeter Group, reports Social Networks Influence Design. Thirty-five percent of the executives cited Facebook as a significant risk, 25% said the same of Twitter, and 15% cited YouTube and other sites for sharing videos.

The executives' biggest concern was damage to the brand's reputation, which was cited by 66%, while 32% of executives said they saw the release of confidential information as a significant or critical risk.

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